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To determine how the internal rotation and shift (IRO/shift) test compares to the gold standard of clinical tests (Jobe test) for diagnosing supraspinatus lesions and to confirm these clinical results with surgical findings, 100 symptomatic patients were clinically examined between October 2018 and November 2019. All 100 patients were evaluated using both the IRO/shift test and Jobe test. A total of 48 of these patients received surgical intervention. Based on these data, sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV), and accuracy for both the IRO/shift test and Jobe test were calculated. The IRO/shift test had a sensitivity of 96% (95% CI: 82–100%), specificity of 50% (95% CI: 27–73%), PPV of 73% (95% CI: 56–86%), NPV of 91% (95% CI: 59–100%), and an accuracy of 77% (95% CI: 63–88%). The Jobe test had a sensitivity of 89% (95% CI: 72–98%), specificity of 60% (95% CI: 36–81%), PPV of 76% (95% CI: 58–89%), NPV of 80% (95% CI: 52–96%), and an accuracy of 77% (95% CI: 54–81%). These results suggest that the IRO/shift test is comparable to the Jobe test, which is often viewed as the gold standard clinical examination for assessing supraspinatus lesions. This study was approved by the Ethics Commission of the Martin Luther University Halle-Wittenberg (reference number: 2018-05).

This study examined the effect of 8 weeks of biweekly combined plyometric and short sprint training into the typical within-season training schedule of youth male soccer players. Participants were allocated at random to an experimental group (EG; n = 17, age: 14.6 ± 0.5 years, body mass: 60.5 ± 7.1 kg, height: 1.64 ± 0.08 m, body fat: 11.3 ± 1.4%) and a control group (CG; n = 17, age: 14.6 ± 0.4 years, body mass: 61.0 ± 3.9 kg, height: 1.67 ± 0.05 m, body fat: 11.8 ± 1.4%). Measures obtained pre- and post-intervention included vertical and horizontal jump performances (i.e., squat jump (SJ), countermovement jump with aimed arms (CMJA), and five-jump test (FJT)) and sprint performances (i.e., 10 and 30 m sprint). In addition, change-of-direction ability (sprint with 90° Turns (S90°) and sprint 9–3–6–3–9 m with backward and forward running (SBF)), repeated shuttle sprint ability (RSSA), and dynamic balance performance (Y balance test) were measured pre- and post-intervention. The EG experienced higher jump (all p < 0.05; d ≥ 0.71), sprint (all p < 0.05; d ≥ 0.64), change-of-direction ability (all p < 0.05; d ≥ 0.66), RSSA (all parameters except the fatigue index p < 0.01; d ≥ 0.71), and dynamic balance (all p ≤ 0.05; d ≥ 0.50) improvement compared to the CG. Adding biweekly combined plyometric and short sprint training to standard training improves the athletic performance of youth male soccer players (under 15 (U15)).

This study examined the differences in the level of physical fitness and academic performance among male middle-school children based on different body status categories. A total of 69 male children [age: 12.4 ± 0.7 years; body mass: 58.5 ± 7.2 kg; height: 1.62 ± 0.09 m; and body mass index (BMI): 22.4 ± 3.3 kg/m2] participated and were divided into BMI age-adjusted groups (i.e., lowest, middle, and highest BMI). Height, mass, BMI, stork test of static balance, 10 and 15 m sprint as an indicator for speed, hand-grip strength test, agility T-half test, medicine ball throw (MBT), and the Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1) were assessed. School records were retrieved for grade point averages (GPA) of mathematics, science, and Arabic. We found significant group differences regarding anthropometric (height: ηp2 = 0.24, mass: ηp2 = 0.33, and BMI: ηp2 = 0.66), physical (sprint 10 m: ηp2 = 0.26), and academic (mathematics: ηp2 = 0.19 and science: ηp2 = 0.15) performance parameters. The largest difference (p < 0.001) was observed between the lowest and highest group for the 10 m sprint. All pairwise differences were between the lowest and highest BMI group or the lowest and middle BMI group. No relevant (r > 0.5) correlation between parameters of different dimensions (e.g., anthropometric vs. physical performance parameters) was found. In conclusion, the highest BMI group exhibited similar physical and academic performances than the lowest group. Thus, these data emphasize the importance and appropriateness to engage young Qatari schoolchildren in physical activity as it associates with superior academic performance.

Background: Using reliable and valid clinical tests are essential for proper diagnosis and clinical outcomes among injuries involving the rotator cuff. The addition of a new clinical examination test could improve the clinical diagnosis and informative value of the sensitivity and specificity of pathology. This study of diagnostic accuracy evaluated the use of a new rotator cuff test, called the internal rotation and shift-test (IRO/shift-test), to determine its reliability and clinical performance (sensitivity, specificity, positive (PPV)/negative predictive value (NPV)). Clinical diagnostic outcomes were confirmed with radiological findings (MRI). Methods: 100 patients from a specialized shoulder unit participated (64 male, 36 female, mean age: 55 ± 13.5 years). A single-blinded (no knowledge of prior clinical or technical diagnostics) study design was used with two experienced physicians performing the IRO/shift-test. For clinical performance, all clinical testing was compared with MRI. Results: The intra-rater (ICC = 0.73, 95% CI: 60-82) and inter-rater (ICC = 0.89, 95% CI: 81-94) coefficients for the IRO/shift-test showed good-to-excellent reliability. 75% of the patients showed a positive IRO/shift-test, while 65% had a radiologically diagnosed superior rotator cuff tear. 60% of these patients had both a positive IRO/shift-test and objective rotator cuff tear via MRI. The sensitivity of the IRO/shift-test to detect superior rotator cuff lesions based on MRI diagnosis was calculated at 92% (95% CI: 86-99%), while specificity was 67% (95% CI: 50-84%). Predictive values were also found to be high with 86% PPV (95% CI: 78-94%) and 80% NPV (95% CI: 64-96%). Conclusion: Our results demonstrate that the IRO/shift-test is a reliable and valid tool for assessing superior rotator cuff pathology. With good-to-excellent intrarater and inter-rater reliability and strong sensitivity and specificity this test should be considered a valuable addition to clinicians’ cadre of clinical evaluation tools.

Although the use of clinical tests to diagnose superior rotator cuff pathology is common, there is paucity in the research regarding the accuracy of such tests following arthroscopic repair. The aim of this study was to determine the accuracy of the IRO/Shift test compared to the Jobe test at 3 months and 6 months post-surgery for superior rotator cuff repair. Arthroscopic repair was conducted on 51 patients who were subsequently seen for clinical evaluation at 3 and 6 months following surgery. At 3 months post-surgery only 27% of the patients had a negative IRO/Shift test and 18% had a negative Jobe test. However, at 6 months 88% of the patients presented with a negative IRO/Shift test and 61% a negative Jobe test. When compared to each other, the IRO/Shift test and the Jobe test had 90% agreement pre-operatively, 71% agreement at 3 months post-surgery, and 67% agreement at 6 months. These results demonstrate that the accuracy of the IRO/Shift test and the Jobe test improved between 3 and 6 months following arthroscopic surgery of the superior rotator cuff, with the IRO/Shift test having better accuracy.

Childhood obesity and loss of physical fitness are rising problems internationally. Although research concerning mitigation strategies has been enforced, empirical results until now fail to address problems and needs of the Gulf region, which has unique geographical and cultural features. Therefore, this study investigated academic performance and physical fitness in normal, overweight, and obese child handball athletes in Qatar. Measurements included anthropometric data (BMI and body fat percentage (%BF)), and physical performance tests: agility T-half test; squat jump (SJ), and countermovement jump (CMJ), 10 and 15 m sprint; medicine ball throw. Aerobic capacity was evaluated using the Yo-Yo Intermittent Recovery Test level 1. Academic achievement was assessed through school records of grades point average (GPA) of Mathematics, Science and Arabic. With the exception of medicine ball throw (obese: 4.08 ± 1.05 m) and sprinting parameters (overweight: 10 m: 2.43 ± 0.35 s, 15 m: 3.60 ± 0.46 s), athletes from the normal weight group showed the highest performance level in all parameters. Between group differences existed for the T-Half Test (p = 0.035, ηp2 = 0.190), CMJ (p = 0.001, ηp2 = 0.363) and SJ (p = 0.007, ηp2 = 0.269). For CMJ and SJ, the comparison between overweight and normal weight also yielded a difference (CMJ: p = 0.005; SJ: p = 0.009). The academic parameters generated the largest difference between groups for science (p = 0.057; ηp2 = 0.164). For all parameters studied, the normal weight group had the highest performance level. In contrast, the overweight group showed the lowest level of academic performance. These findings suggest being overweight or obese are related to science academic performance among schoolchildren in Qatar. Physical education teachers should be cognizant that health promotion interventions improving composition may have the additional potential to improve dimensions of academic performance.

The aims of the study were to assess the reliability and validity of a new handball agility test (HAT), and to evaluate the association between the test and the explosive performance measurements of lower limbs in young handball players. 72 young handball players (15.6 ± 0.4 years) participated in this study. All players conducted the HAT using a modified ZIG ZAG course consisting of three 5-m sections set out at 100° angles. Electronic timing gates were used to record completion times. To assess the reliability of the HAT, each player performed the tests twice, on separate days. The criterion validity of the HAT was determined by examining the relationship between the HAT performances and two popular agility tests performances (T-half test and the Illinois test). Participants also underwent measurements squat and counter-movement jumps, sprinting velocities on 5-m (V5) and 10-m (V10), and handball specific skill test (HST). The results showed no difference between test–retest HAT scores. Intra class reliability of the HAT was greater than 0.91 across the trials (0.92 and 0.97, respectively). The HAT was closely related to both the T-half test and Illinois agility tests (r= 0.52 and r = 0.68, p< 0.05). Relevant correlations were found between HAT, CMJ and SJ (r = 0.58 and r = 0.38 respectively; p

We examined the relationships between body fat (BF) and field measures of physical fitness in adolescent handball players. Twenty nine players (age: 16.6 &plusmn, 1.72 years, body mass: 79.8 &plusmn, 17.0 kg, height: 1.70 &plusmn, 0.12 m, body fat: 27.7 &plusmn, 8.67%) from Qatar handball first league performed a series of anthropometric and fitness tests related to their performance in sprinting (i.e., 15 m and 30 m sprint), jumping (i.e., countermovement and squat jumps), throwing (i.e., 3 kg medicine ball seated front throw) and running (i.e., agility T-Half and Yo-Yo intermittent recovery level 1 tests). Significant differences between obese and non-obese groups, classified based on age-stratified %BF norms, were found, with the largest difference being attributed to aerobic performance on the Yo-Yo test. Results indicated no significant relationships between anthropometric variables and sprinting or jumping abilities. %BF predicted a significant 8&ndash, 15% portion in running performances of agility and aerobic capacity, while the latter were mainly explained by body height and mass. %BF was the only and strongest predictor of throwing performance, being an important determinant of performance in handball. Optimizing %BF should be considered as a training and nutrition goal in order to improve sport performance.

The aim of the study was to assess the validity and reliability of wearable body metric Hexoskin "smart shirt" in measuring heart rate (HR) at pre-exercise and during peak effort in a field test incorporating vigorous movements of the upper body. Measurements were recorded simultaneously using the Hexoskin and Polar Team Pro. Nine male professional handball players (age: 21.8 ± 2.4 years; weight: 83 ± 10.26 kg; height: 1.81 ± 0.09 m; and BMI: 25.17 ± 2.23) volitionally participated in the study by completing two 400 m shuttle run test trials (10 shuttles), each separated by a 48 to 72 h recovery period. Results indicated significant correlations between Hexoskin and Polar Team Pro system in pre-exercise HR. Hexoskin provided erroneous measurements in four of the nine athletes during peak effort. Subsequent correction yielded no consistency between the Polar Team Pro system and Hexoskin between the first and the second trial. Hexoskin showed significant reliability in pre-exercise HR. However, Hexoskin picked up excessive artifact during vigorous physical activity in four of the nine athletes rendering the results in these cases useless. Nevertheless, in athletes where artifact was not an issue, ICC yielded a good estimate. The main findings indicate that Hexoskin has good validity and reliability in measuring pre-exercise HR in handball players and hence may be used with high confidence in slow motion activities. However, vigorous physical activity with jarring multidirectional upper body movements posed a challenge for Hexoskin.

The purpose of this study was to determine the effects of 12 weeks of circuit training on physical fitness in handball players. Subjects were randomly divided into a circuit strength training group (CT, n = 10) and a control group (CG, n = 9). Training sessions and matches were performed together, but during the 12-week intervention, the experimental group replaced part of the regular regimen with circuit strength training. Measures assessed in both groups before and after the intervention included: the agility T-half Test, the Yo-Yo intermittent recovery test, squat and counter-movement jumps, 15 m and 30 m sprints, and strength tests for the bench press, pull over, and the half squat. The upper limb bench press and pull-over tests along with the lower limb back half squat were performed using a 1-repetition maximum protocol. Based on the intraclass correlation coefficient and excluding the agility T-test (ICC = 0.72), we found excellent relative reliability for all variables (intraclass correlation coefficient range: 0.85-0.96, SEM range: 0.03-3.00). For absolute reliability or coefficients of variation, 71% (5/7) of the variables were excellent (CV < 5%). The circuit strength training group showed significant interaction effects and relevant effect sizes for the 12-week training period (8/9, 89%), and the mean effect size for the CT was markedly higher (d = 1.3, range: 0.41 - 2.76) than in the CG (d = - 1.0, range: -0.73 - 0.29). The largest improvements were in the Yo-Yo test (d = 2.76) and the squat jump (d = 2.05). These results show that a 12-week circuit strength training program is an effective method to increase handball-related performance characteristics.

This investigation explored the association between anthropometric measures, fitness, and academic attainment (mathematics and science grade point average [GPA]) in male schoolchildren from a soccer academy. Thirty-one males (age: 10.3 ± 1.19 years; body mass: 41.7 ± 6.5 kg; height: 1.43 ± 0.07 m; body mass index (BMI): 20.2 ± 2.8 kg/m2) participated. Body mass, body fat percentage (%BF), and BMI were used as measures of anthropometry. The Yo-Yo Intermittent Recovery Test (level 1), squat and counter-movement jumps (SJ and CMJ), static balance, 10 and 15 m sprint, and a T-half test for change-of-direction (CoD) performance were used to measure fitness parameters. The GPA of mathematics and science determined academic attainment. All physical performance tests showed excellent relative reliability. ICC was between 0.87 (10 m sprint) and 1.00 (15 m sprint, CMJ). Regarding correlations between fatness and academic attainment, we found three correlations of practical value (r > 0.5), but only for mathematics (BMI: r = 0.540, subscapular skinfold: r = 0.589, body fat: r = 0.560). Mathematics was relevantly correlated with 15 m sprint (r = 0.574) and Yo-Yo IR1 test (r = 0.770). Only static balance (r = 0.428) did not reach the relevance criteria (r > 0.5). Science only showed large correlations with static balance (r = 0.620) and Yo-Yo IR1 test (r = 0.730). In conclusion, fatness and fitness are related to academic attainment in schoolchildren. In addition, except for static balance, all physical performance parameters were relevantly (r > 0.5) correlated with mathematics.

This study aimed to investigate relationships between peak power (PP) as measured by upper limb (PPUL) and lower limb (PPLL) force velocity tests, maximal upper limb force assessed by clean and jerk (1RMCJ) and snatch (1RMSE) exercises, estimates of local muscle volume and throwing ball velocity. Thirty elite male handball players volunteered for the investigation (age: 20.3 ± 2.1 years; body mass: 82.5 ± 10.5 kg; height: 1.85 ± 0,07 %; body fat: 13.1 ± 2.1 %). Lower and upper limb force velocity tests were performed on appropriately modified forms of a Monark cycle ergometer with measurement of PPUL and PPLL, and the corresponding respective maximal forces (F0UL and F0LL) and velocities (V0UL and V0LL). Snatched (SN) and clean and jerk (CJ) exercises were performed to one repetition maximum (1RM). Handball throwing velocity was measured with jump shot (JS) without run-up (TW) and 3 steps shot (T3 step). Muscle volumes of the upper and lower limbs were estimated with a standard anthropometric kit. The 1RM CJ proved to be the most important predictor for throwing velocity. All types of throwing showed a high correlation with this parameter (JS: r = 0.75; TW: r = 0.62; T3 step: r = 0.66). The highest relation was detected between jump shot and 1RM snatch technique (r = 0.82). The PPUL muscle volume correlated highly with PPUL absolute power (r = 0.70). In contrast, we did not find any comparable relations for the lower limb (muscle volume vs. PPUL absolute power: r = 0.07). Our results highlight the contribution of both lower and upper limbs to handball throwing velocity, suggesting the need for coaches to include upper and lower limb strength weightlifting exercises and power programs when improving the throwing velocity of handball players. Ziel der Studie war es, die Beziehungen zwischen der maximalen Ergometerleistung der oberen (PPUL) und unteren (PPLL) Extremität und der Maximalkraft (Umsetzen und Stoßen, olympisches Gewichtheben: Reißen) zur Wurfgeschwindigkeit und zum lokalen Muskelvolumen aufzuklären. 30 professionelle Handballspieler nahmen an der Untersuchung teil (Alter: 20,3 ± 2,1 Jahre; Gewicht: 82,5 ± 10,5 kg; Größe: 1,85 ± 0,07 m; Körperfett: 13,1 ± 2,1 %). Die Ergometrietests der oberen und unteren Extremität wurden auf einem modifizierten Ergometer (Monark-cycle) unter Messung der PPUL und PPLL durchgeführt. Hierbei wurden die maximalen Kräfte und Geschwindigkeiten ermittelt. Das 1RM wurde für die Testübungen olympisches Gewichtheben/Reißen (SN) sowie Umsetzen und Stoßen (CJ) bestimmt. Die maximalen Wurfgeschwindigkeiten wurden für 3 Wurftypen (Sprungwurf, Schlagwurf aus dem Stand, Schlagwurf aus der Bewegung (3 Schritte) mit Stemmschritt) gemessen. Überdies erfolgte die Messung der Muskelvolumina. Die Maximalkraftleistung in der Testübung Umsetzen und Stoßen erwies sich als wichtigster Prädiktor für die Wurfgeschwindigkeit. Alle Wurftypen korrelierten hoch mit den Maximalkraftparametern (Sprungwurf: r = 0,75; Schlagwurf/Stand: r = 0,62; Schlagwurf/Bewegung: r = 0,66). Die höchste Korrelation ließ sich für die Parameter Sprungwurf und SN berechnen (r = 0,82). Das Muskelvolumen der oberen Extremität korrelierte hoch mit der PPUL (r = 0,70). Im Gegensatz dazu fanden sich keine vergleichbaren Beziehungen zur unteren Extremität (Muskelvolumen untere Extremität vs. PPUL: r = 0,07). Die Ergebnisse bekräftigen die Notwendigkeit eines Maximalkrafttrainings im Bereich der oberen und unteren Extremität zum Zwecke der Erhöhung der Wurfgeschwindigkeit. Für die Trainingspraxis ergibt sich die Empfehlung, spezifische Kräftigungsprogramme in das Handballtraining zu integrieren.

The purpose of this study was to assess the validity of a new basketball-specific complex test (BBCT) based on the ascertained match performance.Fourteen female professional basketball players (ages: 23.4 ± 1.8 years) performed the BBCT and a treadmill test (TT) at the beginning of pre-season training. Lactate, heart rate (HR), time, shooting precision and number of errors were measured during the four test sequences of the BBCT (short distance sprinting with direction changes, with and without a ball; fast break; lay-up parcours; sprint endurance test). In addition, lactate threshold (LT) and HR were assessed at selected times throughout the TT and the BBCT and over 6 (TT) or 10 (BBCT) minutes after the tests. The match performance score (mps) was calculated on specific parameters (e. g. points) collected during all matches during the subsequent season (22 matches). The mps served as the "gold standard" within the validation process for the BBCT and the TT.TT parameters demonstrated an explained variance (EV) between 0 % (HR recovery) and 11 % (running speed at 6 mmol/l LT). The EV from the BBCT was higher and ranged from 0 % (HR recovery 6 minutes after end of exercise) to 28 % (sprint endurance test after 8 of 10 sprints). Ten out of 21 BBCT parameters (48 %) and 2 out of 5 TT parameters (40 %) demonstrated an EV higher than 10 %. Average EV for all parameters was 12 % (BBCT) and 6 % (TT), respectively. The BBCT had a higher validity than the TT for predicting match performance. These findings suggest that coaches and scientists should consider using the BBCT testing protocol to estimate the match performance abilities of elite female players.Ziel der Studie war die Messung der Validität eines neuen basketballspezifischen Komplextests (BBCT) auf der Grundlage der ermittelten Spielleistung. 14 Basketballerinnen (Alter: 23,4 ± 1,8 Jahre) führten den BBCT und eine Laufbandleistungsdiagnostik (TT) zu Saisonbeginn durch. Innerhalb des BBCT wurden die Parameter Laktat, Herzfrequenz (HR), Zeit, Wurfgenauigkeit und technische Fehler erfasst. Der BBCT beinhaltet 4 Handlungsfolgen: Kurzdistanzsprint mit Richtungswechsel ohne und mit Ball, Fast Break, Korblegerparcours, Sprintausdauertest. Die Messparameter wurden unmittelbar vor dem BBCT sowie 2, 6 und 10 Minuten nach Testende erhoben. Beim TT erfolgte die Schwellenberechnung anhand der Laktat-Leistungs-Kurve. Die Spielwirksamkeit, die den „Goldstandard” (abhängige Variable) innerhalb des Validierungsprozesses (BBCT, TT) darstellte, wurde auf der Basis spezifischer Spielparameter (z. B. Punkte) berechnet. Die Spielparameter wurden über die gesamte Saison (22 Spiele) erhoben. Die Parameter des TT zeigten eine Varianzaufklärung (EV) zwischen 0 % (kardiale Erholung) und 11 % (Laufgeschwindigkeit an der 6 mmol/l-Schwelle). Die EV des BBCT war höher und bewegte sich zwischen 0 % (kardiale Erholung 6 Minuten nach Belastungsende) und 28 % (Sprintausdauertest nach 8 von 10 Sprints). 48 % (10/21) der BBCT-Parameter und 40 % (2/5) der TT-Parameter wiesen eine EV über 10 % auf. Im Mittel betrug die EV für alle Parameter 12 % (BBCT) bzw. 6 % (TT). Der BBCT hat, bezogen auf die Spielwirksamkeit im Basketball, eine größere Validität als der TT. Die Studienergebnisse sollten Trainer und Wissenschaftler ermuntern, den BBCT in die basketballspezifische Leistungsdiagnostik (LD) zu implementieren. Gleichzeitig sollte die LD immer im unmittelbaren Kontext zur Messung der Spielwirksamkeit stehen.

The purpose of this study was to examine relationships between lower body muscular strength, anthropometric characteristics and several measures of explosive performance in elite team-handball players. 22 male elite team-handball players (age: 19.1 ± 1.7 years) were studied during the competitive season. Standard anthropometric and body composition measures included body mass index, lower limb and thigh muscle volume, and body fat percentage. Maximal leg strength was determined by a one-repetition maximum (1-RM) half back-squat. Vertical jump performance was assessed using a squat jump (SJ) and a counter movement jump (CMJ). Repeated shuttle-sprint ability (RSA) was tested by 6 (2 × 15 m) shuttle sprints with 20 s of active recovery intervals. The best time in a single shuttle sprint (30m; RSA The explained variance of 1-RM half-back-squats ranged from 0.2 % (RSA% Fatigue Index) to 70.1 % (CMJ). Four out of 8 variables (RSA Best Time, CMJ, SJ, throwing velocity of jump shoot) demonstrated an r The anthropometric characteristics and some physical performance tests are closely related to the maximal strength performance of handball players. Coaches should focus on maximal strength training programs for the lower limbs when seeking improvements in the throwing velocity and jump performance of handball players. Ziel dieser Studie war es, die Zusammenhänge zwischen der Muskelkraft der unteren Extremitäten, anthropometrischen Eigenschaften und mehreren Messgrößen der Explosivkraftleistung bei Handballspielern im Spitzensport zu untersuchen. 22 Leistungshandballer (Alter: 19,1 ± 1,7 Jahre) wurden während der Wettbewerbssaison untersucht. Als Standardgrößen für die anthropometrischen Messungen und die Körperzusammensetzung wurden der Body-Mass-Index, die Muskelvolumina der unteren Extremitäten und Oberschenkel sowie der prozentuale Körperfettanteil bestimmt. Die maximale Beinkraft wurde anhand des Wiederholungsmaximums (1-RM) von Halbkniebeugen gemessen. Die Beurteilung der Vertikalsprungleistung erfolgte durch einen Squat-Jump (SJ) und einen Counter-Movement-Jump (CMJ). Die Repeated-Shuttle-Sprint-Ability (RSA) wurde anhand von 6 Shuttle-Sprints (2 × 15 m) mit aktiven Erholungsintervallen von 20 s überprüft. Desweiteren wurden die Bestzeit im Single-Shuttle-Sprint (30m; RSA Die erklärte Varianz des 1-RM der Halbkniebeugen reichte von 0,2 % (RSA% Fatigue Index) bis 70,1 % (CMJ). 4 von 8 Variablen (RSA -Bestzeit, CMJ, SJ, Wurfgeschwindigkeit beim Jump-Shooting) zeigten ein r Die anthropometrischen Eigenschaften und einige physikalische Leistungstests sind bei Handballspielern eng mit der Maximalkraftleistung verbunden. Trainer, die Verbesserungen der Wurfgeschwindigkeit und Sprungleistung bei Handballspielern anstreben, sollten den Trainingsschwerpunkt auf ein Maximalkrafttraining für die unteren Extremitäten legen.

Hammami, M, Negra, Y, Billaut, F, Hermassi, S, Shephard, RJ, and Chelly, MS. Effects of lower-limb strength training on agility, repeated sprinting with changes of direction, leg peak power, and neuromuscular adaptations of soccer players. J Strength Cond Res 32(1): 37-47, 2018-We examined the effects on explosive muscular performance of incorporating 8 weeks strength training into the preparation of junior male soccer players, allocating subjects between an experimental group (E, n = 19) and a matched control group (C, n = 12). Controls maintained their regular training program, but the experimental group replaced a part of this schedule by strength training. Performance was assessed using running times (5, 10, 20, 30 and 40 m), a sprint test with 180° turns (S180°), a 9-3-6-3-9 m sprint with backward and forward running (SBF), a 4 × 5 m sprint test with turns, repeated shuttle sprinting, repeated changes of direction, squat (SJ) and counter-movement (CMJ) jumping, back half-squatting, and a force-velocity test. Electromyographic (EMG) activity of the vastus lateralis (VL), vastus medialis (VM), and rectus femoris (RF) muscles was recorded during jumping. Two-way ANOVA showed significant gains in E relative to C during the straight sprint (all distances). Scores of E increased substantially (p ≤ 0.01) on S4 × 5 and SBF and moderately on S180°. Leg peak power, SJ, and CMJ were also enhanced, with significant increases in EMG activity. However, repeated-sprint parameters showed no significant changes. We conclude that biweekly strength training improves key components of performance in junior soccer players relative to standard in-season training.

Muscular strength and speed are critical physical factors in determining the technical and tactical skills of elite team handball players. This study thus investigated the effect of high-intensity muscular strength and sprint interval training (SIT) on lower limb explosive performance and anthropometric characteristics in 22 male handball athletes aged 20.2 ± 0.1 years. A training group (TG, n = 12) and a control group (CG, n = 10) were followed over 8 weeks parallel to regular handball training. The TG received combined additional high-intensity muscular strength and interval training twice per week during this period. The muscular training was comprised of 3 - 4 sets of 70 - 85 % of 1-RM (repetition maximum) of dynamic back half squat exercise; followed immediately by a short sprint program with 4, 5, and 6 maximal intensity repetitions of 30 m runs. Strength (1-RM of the half back-squat and bench press), first step (V1S), first 5 m (V5 m), squat jumps (SJ), counter movement jumps (CMJ) and the Modified Agility Test (MAT) were tested at the beginning and end of the study. Significant interaction effects (group × time) were observed for all parameters (η² range: 0.531 (MAT) to 0.829 (First 5 m)). All 10 parameters showed relevant intervention effects (d 0.5) in the TG (highest intervention effect: CMJ: d = 4.05), the mean effect size being d = 1.85. In contrast, scores for the CG either remained unchanged or decreased (d = -0.24). We conclude that combined high-intensity strength and sprint interval training during the competitive season should be recommended to elite male handball players as a means of improving handball-related performance characteristics without compromising other critical aspects of the individual's performance.Muskelkraft und Schnelligkeit sind entscheidende körperliche Faktoren bei der Ermittlung der technischen und taktischen Fähigkeiten von Handballspielern im Spitzensport. Daher untersuchte die vorliegende Studie die Wirkung von hochintensivem Muskelkraft- und Sprint-Intervall-Training (SIT) auf die Explosivkraftleistung der unteren Extremitäten sowie anthropometrische Eigenschaften bei 22 männlichen Handballsportlern im Alter von 20,2 ± 0,1 Jahren. Eine Trainingsgruppe (TG, n = 12) und eine Kontrollgruppe (CG, n = 10) wurden 8 Wochen lang parallel zu ihrem regulären Handballtraining nachverfolgt. Während dieses Zeitraums erhielt die TG zweimal pro Woche zusätzlich eine Kombination aus hochintensivem Muskelkraft- und Intervall-Training. Das Muskeltraining umfasste eine dynamische Übung mit Halbkniebeugen (70 – 85 % 1-RM (Wiederholungsmaximum), 3 – 4 Sätze) und unmittelbar im Anschluss ein kurzes Sprintprogramm aus 30-Meter-Läufen mit 4, 5 und 6 Wiederholungen maximaler Intensität. Zu Studienbeginn und -ende erfolgte eine Überprüfung der Parameter Kraft (1-RM von Halbkniebeuge und Bankdrücken), erster Schritt (V1S), erste 5 m (V5 m), Squat Jumps (SJ), Counter Movement Jumps (CMJ) und Modified Agility Test (MAT). Es fanden sich signifikante Interaktionseffekte (Gruppe × Zeit) für alle Parameter (η²-Bereich: 0,531 (MAT) bis 0,829 (erste 5 m)). Alle 10 Parameter zeigten relevante Interventionseffekte (d 0,5) in der TG (höchster Interventionseffekt: CMJ: d = 4,05) mit einer mittleren Effektgröße von d = 1,85. In der CG hingegen fanden sich gleichbleibende oder rückläufige Werte (d = –0,24). Schlussfolgerung: Männlichen Handballspielern im Spitzensport sollte während der Wettkampfsaison eine Kombination aus hochintensivem Kraft- und Sprint-Intervall-Training empfohlen werden, da diese die handballbezogenen Leistungsmerkmale verbessert, ohne andere entscheidende Aspekte der individuellen Leistung zu beeinträchtigen.

Objective To obtain spatiotemporal and dynamic running parameters of healthy participants and to identify relationships between running parameters, speed, and physical characteristics. Method A dynamometric treadmill was used to collect running data among 417 asymptomatic subjects during speeds ranging from 10 to 24 km/h. Spatiotemporal and dynamic running parameters were calculated and measured. Results Results of the analyses showed that assessing running parameters is dependent on running speed. Body height correlated with stride length (r = 0.5), cadence (r = −0.5) and plantar forefoot force (r = 0.6). Body mass also had a strong relationship to plantar forefoot forces at 14 and 24 km/h and plantar midfoot forces at 14 and 24 km/h. Conclusion This reference data base can be used in the kinematic and kinetic evaluation of running under a wide range of speeds.

Team handball is an intense sport with special requirements on technical and tactical skills as well as physical performance. The ability of handball players to make repeated powerful muscular contractions in pushing and throwing the ball is crucial to success. This study investigated the effects of elastic band training on upper body peak power output, ball throwing velocity, and local muscle volume of junior handball players. Thirty handball players (a single national-level Tunisian team) were randomly assigned to a control group (CG; n = 15) and an experimental group (EG; n = 15). Pre- and post-interventional measurements included force-velocity tests, one-repetition maximum (1RM) bench press and pull-over strength, ball throwing velocity in three types of throw (jumping shot, 3-step running throw, and standing throw), and anthropometric estimates of limb volumes. The EG additionally performed an elastic band training programme twice a week for 8 weeks immediately before engaging in regular handball training. The control group underwent no additional elastic band training. The EG demonstrated greater improvements in absolute and relative peak power (p 0.001; 49.3 ± 22.9 % and 47.9 ± 24.6 %, respectively), 1RM strength (p 0.001; 25.3 ± 2.2 % and 44.1 ± 9.0 % for 1RM bench press and pull over, respectively), and throwing velocity in all three types of ball throws (p 0.001; 25.1-26.1 %), compared to the CG (3.9-4.4 %). Limb volumes increased significantly (p = 0.001, 8.0 ± 7.5 %) in the EG, with no significant change (p = 0.175, 2.6 ± 7.0 %) in the CG. We conclude that additional elastic band training performed twice a week for 8 weeks improves measures relevant to game performance, particularly strength, power, and ball throwing velocity. Teamhandball ist gekennzeichnet durch intervallartige Belastungen mit besonderen Anforderungen an technische und taktische Fertigkeiten sowie die körperliche Leistungsfähigkeit. Besonders wichtig für den sportlichen Erfolg sind die unterschiedlichen Dimensionen der Kraft sowie die Ballwurfgeschwindigkeit und Schnelligkeitsausdauer. Die Studie untersuchte die Auswirkungen des elastischen Bandtrainings auf die Maximalkraft der oberen Extremität, die Ballwurfgeschwindigkeit und das lokale Muskelvolumen von Nachwuchshandballspielern. 30 professionelle tunesische Handballspieler wurden der Kontrollgruppe (CG; n = 15) und der Experimentalgruppe (EG; n = 15) randomisiert zugeteilt. Messungen vor und nach der Intervention beinhalteten Kraft-Geschwindigkeitstests und Maximalkrafttests (1RM) in den Übungen Bench press und Pull over. Überdies wurden die Ballwurfgeschwindigkeit (Sprungwurf, Schlagwurf aus der Bewegung (3 Schritte) mit Stemmschritt, Schlagwurf aus dem Stand) und lokale Muskelvolumina ermittelt. Unmittelbar vor dem regulären Handballtraining absolvierte die EG 2-mal pro Woche über 8 Wochen ein Trainingsprogramm mit elastischen Bändern. Die Kontrollgruppe unterzog sich indes keinem zusätzlichen elastischen Bandtraining. Die EG zeigte sowohl in der absoluten als auch relativen Maximalkraftleistung (p 0,001; 49,3 ± 22,9 %, 47,9 ± 24,6 %) als auch im 1RM (p 0,001; Bench press: 25,3 ± 2,2 %; Pull over: 44,1 ± 9,0 %) deutlich größere Leistungszuwächse als die CG. Seitens der Wurfgeschwindigkeit erzielte die CG in allen 3 Wurfarten (p 0,001; 25,1–26,1 %) signifikant größere Leistungssteigerungen als die CG (3,9–4,4 %). Das Muskelvolumen erhöhte sich signifikant in der EG (p = 0,001, 8,0 ± 7,5 %), wohingegen in der CG keine signifikanten Veränderungen zu beobachten waren (p = 0,175; 2,6 ± 7,0 %). Ein zusätzliches elastisches Bandtraining (2-mal pro Woche für 8 Wochen) ist in der Lage, den relevanten handballspezifischen Leistungsparameter Kraft (z. B. Ballfluggeschwindigkeit) nachhaltig zu verbessern.

This project investigated the effect of incorporating 8 weeks of biweekly upper limb loaded plyometric training (using elastic bands) into the in-season regimen of handball players. Participants were randomly allocated to a control group (CG) (n = 15, age = 18.1 ± 0.5 years, body mass = 73.7 ± 13.9 kg), or an experimental group (EG) (n = 14, age = 17.7 ± 0.3 years, body mass = 76.8 ± 10.7 kg). The measurements obtained pre- and post-intervention included a cycle ergometer force–velocity test, ball throwing velocity in three types of throwing, one-repetition maximum (1-RM) bench press and pull-over, and anthropometric estimates of the upper limb muscle volumes. The EG improved in absolute muscle power (W) (Δ23.3%, interaction effect p = 0.032 more than pre-intervention), relative muscle power (W·kg−1) (Δ22.3%, interaction effect p = 0.024), and all three types of ball throwing (Δ18.6%, interaction effect p = 0.019 on a jumping shot, Δ18.6%, interaction effect p = 0.017 on a three-step running throw, and Δ19.1%, interaction effect p = 0.046 on a standing throw). There was no interaction effect for the 1-RM bench press and pull-over performance. The upper limb muscle volumes remained unchanged in both groups. We concluded that adding biweekly elastic band plyometric training to standard training improves the muscle power and throwing velocity. Accordingly, such exercises should be adopted as a part of a pragmatic approach to handball training.

Hintergrund: In der Fusballleistungsdiagnostik (FLD) werden zumeist fusballunspezifische Tests verwendet. Neben der Fusballspezifik fehlt uberdies die wissenschaftliche Validierung anhand des Goldstandards Spielwirksamkeit. Auch seitens der Spielwirksamkeit selbst besteht aktuell ein eklatantes Forschungsdefizit. Fragestellung: Ziel der multizentrischen, prospektiven Diagnostikstudie war es, etablierte bzw. tradierte Tests der FLD anhand der Spielwirksamkeit (Goldstandard: Spielzeit) zu validieren. Methodik: Insgesamt wurden zwei Teams der 4. (n = 22) und 3. Liga (n = 24) prospektiv untersucht. Zunachst erfolgte zu Beginn der Vorbereitungsperiode die FLD (Tapping, Drop Jump, Counter Movement Jump, Tempodribbling, Laufbandstufentest). Anschliesend wurde die Spielwirksamkeit anhand des Surrogatparameters Spielzeit uber eine Halbserie (14 bzw. 25 Spiele) ermittelt sowie mit den Testleistungen in Beziehung gesetzt (lineare Regressionsanalyse). Ergebnisse: Alle Tests respektive Parameter erwiesen sich seitens der Spielwirksamkeit (Spielzeit) als nicht bedeutsam (r2 Schlussfolgerung: Die Testergebnisse zeigen sehr deutlich, wie wenig valide bzw. fusballrelevant die durchgefuhrten isolierten, fusballunspezifischen Tests sind. Diskutabel ist die Verwendung der Spielzeit als Surrogatparameter fur die Spielwirksamkeit. Gleichsam ist die Parametrisierung und Objektivierung der Spielwirksamkeit aktuell die vordringlichste Aufgabe im Rahmen der Qualifizierung der FLD. Erst das Vorhandensein eines aussagekraftigen Goldstandards ermoglicht die Validierung vorhandener Tests bzw. die Entwicklung neuer Testdesigns. Aktuell besitzt die FLD keine wissenschaftliche Legitimierung.

The purpose of this study was to determine the intraobserver reliability (IR) of the handball-specific complex test (HBKT) and the validity of the HBKT and nonspecific tests. Thirty experienced players (25.7 ± 3.9 years) executed the HBKT twice (time interval: 2 days). Lactate, heart rate (HR), time, throwing velocity and number of errors were measured. Afterwards, players' match performances (MPs) in 30 matches were evaluated using video analysis to compare it with the test parameters. Resting HR between first half and second half (r(2) = 0.26), standing long jump (r(2) = 0.18), jump and reach (r(2) = 0.16), and HR before second half (r(2) = 0.14) were proven to be the most valid tests or parameters. The amounts of explained variance concerning the MP of all other tests/parameters were below 10%. Overall, 41% (12/29) of the parameters showed a high relative intraclass correlation coefficient (ICC > 0.75) and absolute coefficient of variation (CV ≤ 5%) IR. Results suggest that the HBKT can be certified with an insufficient validity and a sufficient absolute (∅CV = 11.3%) and relative (∅ICC = 0.67) IR. The reasons could be insufficient tests or insufficient score of MP. The current findings suggest that the coaches and scientists should recognize a lot of effort is necessary to measure MP and to develop valid tests. Additional research should aim to connect test and MP with each other. Before a coach applies a test, he should thoroughly check whether the test is valid (gold standard: MP) and reliable. The frequent and long-term test application (very common argument of the coaches in practice) is not a proof of validity.

Handball performance is influenced by age, anthropometric characteristics, technical skills, tactical understanding, and physical abilities. The aims of this study were (i) to determine differences in anthropometric characteristics and physical performance between adolescent handball players across age categories, and (ii) to determine which anthropometric and maturity variables have the greatest relative importance in fitness for this sport. Seventy-nine male handball players drawn from a team in the elite Tunisian Handball league [U18 (n = 10); U17 (n = 12); U16 (n = 17); U15 (n = 18); and U14 (n = 22)] volunteered for the investigation. Assessments included sprint performances; change in direction tests (T-half test and Illinois modified test); jumping tests (squat jump; counter movement jump; countermovement jump with aimed arms; five-jump test); medicine ball throwing; handgrip force; back extensor force and selected anthropometric measurements. The individual’s age category affected all measurements, with U17 and U18 players showing larger body measurements and significantly better absolute results on all physical tests than U14, U15 and U16 contestants. Scores for the majority of physical performance tests were closely inter-correlated. We conclude that U17 and U18 players show significantly better absolute results than the younger players on all physical tests. Multiple linear regressions, using block-wise entry, indicate that age is the strongest predictor of jump and sprint performances. Several anthropometric characteristics, including body mass, standing height and lower limb length were closely correlated with performance test scores, but after allowing for age only body mass added to the prediction of jumping ability. The authors thank the ?Ministry of Higher Education and Scientific Research, Tunis, Tunisia? for the financial support. The authors also thank Associate Professor Ridha Aouedi, Ph.D. [Research Unit (UR17JS01) ?Sport Performance, Health and Society,? Higher Institute of Sport and Physical Education of Ksar Sa?d, University of ?La Manouba?, Tunis, Tunisia] for the valuable statistical help. The publication of this article was funded by the Qatar National Library. Scopus

Aloui, G, Hammami, M, Fathloun, M, Hermassi, S, Gaamouri, N, Shephard, RJ, and Chelly, MS. Effects of an 8-week in-season elastic band training program on explosive muscle performance, change of direction, and repeated changes of direction in the lower limbs of junior male handball players. J Strength Cond Res 33(7): 1804-1815, 2019-The aim of this study was to examine the effects of incorporating 8 weeks of biweekly lower-limb elastic band training (knee and hip extension) into the in-season regimen of junior handball players. Study participants (30 men, aged 18.7 ± 0.8 years, body mass 81.1 ± 15.4 kg, height 1.82 ± 0.06 m, body fat: 15.5 ± 5.2%) were randomly assigned between control and experimental groups. Measures obtained before and after intervention included a cycle ergometer force-velocity test, force platform determinations of squat and countermovement jump characteristics, sprint times (5 and 30 m), repeated change-of-direction (RCOD) and change-of-direction (T-half, COD) tests, 1 repetition maximum (RM) half back squat, and anthropometric estimates of limb muscle volumes. Small to trivial improvements of experimental subjects relative to control subjects included peak power (p < 0.001), 1RM strength measures (p < 0.01), sprint times (p < 0.001 for 5 m; p < 0.05 for 30 m), COD (p < 0.01), and all RCOD parameters (p < 0.05) except the RCOD fatigue index. However, vertical jump parameters and limb volumes remained unchanged relative to controls. It may be concluded that adding biweekly elastic band training to a standard conditioning regimen yields small gains in measures that likely have an important influence on handball performance, particularly the ability to sprint, change direction, and make repeated changes of direction. Accordingly, such simple exercises can usefully be adopted as a component of handball training.

This study assessed the intra-rater reliability of an ice hockey-specific complex test (IHCT) that reflects the intense multidirectional and intermittent efforts required in ice hockey.Twenty professional players executed the IHCT twice over an interval of 2 days. Load parameters included a 10-m sprint, a 30-m transition with and without a puck, as well as slap and wrist shots. Stress parameters were lactate concentrations and heart rates.The intrarater reliability (ICC) ranged from 0.54 to 0.98 for load parameters, and from 0.26 to 0.87 for stress parameters. 33 % (3/9) of stress parameters and 82 % (18/22) of load parameters had an ICC 0.75. The largest limits of agreement were 41.6 for slap shot 1 after test and 50.4 for 6-min heart rate recovery. The smallest were 0.40 (10-m sprint without a puck) and 5.36 (resting lactate). The intra-rater reliability as shown by the coefficient of variation (CV) was lower for stress than for load parameters (mean CV: 13.4 vs. 4.7). 68 % (15/22) of load parameters and 11 % (1/9) of stress parameters showed a CV below 5 %.The IHCT is currently the only ice hockey-specific complex test with scientifically tested reliability and validity that can analyze performance under conditions similar to competition. It is suggested that coaches, fitness coaches and sports scientists explore use of this test as a valid tool to assess players' performance and the effectiveness of training interventions.Ziel der Studie war es, einen validierten eishockeyspezifischen Komplextest (IHCT), der eng am Anforderungsprofil der Sportart orientiert ist, hinsichtlich seiner Intrarater-Reliabilität zu prüfen.20 professionelle Eishockeyspieler absolvierten den IHCT im Abstand von 2 Tagen. Innerhalb des IHCT wurden sowohl Belastungsparameter (z. B. Sprintzeit 10 m und 30 m ohne und mit Puck, Schussgeschwindigkeit und -genauigkeit) als auch Beanspruchungsparameter (Laktat, Herzfrequenz) erfasst.Seitens der Belastungsparameter bewegte sich die Intrarater-Reliabilität (Intraclass-Korrelationskoeffizient (ICC)) zwischen 0,54 und 0,98. Für die Beanspruchungsparameter ließen sich ICC-Werte zwischen 0,26 und 0,87 berechnen. 33 % (3/9) der Beanspruchungsparameter und 82 % (18/22) der Belastungsparameter zeigten eine hohe Reliabilität (ICC 0,75). Die größten Limits of Agreement bewegten sich zwischen 41,6 (Schlagschuss 1 nach Test) und 50,4 (Erholungsherzfrequenz in Minute 6 nach Test). Die geringsten Differenzen wurden für den 10m-Sprint ohne Puck (0,40) und den Ruhe-Laktatwert (5,36) ermittelt. Auch auf der Basis des Coefficient of Variation (CV) war die Intrarater-Reliabilität für die Beanspruchungsparameter deutlich geringer als für die Belastungsparameter (CV: 13,4 vs. 4,7). 68 % (15/22) der Belastungsparameter und 11 % (1/9) der Beanspruchungsparameter wiesen einen CV unter 5 % auf.Der IHCT ist aktuell der einzige eishockeyspezifische Komplextest, der die sportartspezifische Leistungsfähigkeit unter wettkampfähnlichen Bedingungen testet und darüber hinaus einen wissenschaftlichen Reliabilitäts- und Validitätsnachweis besitzt. Die Testergebnisse sollten alle Akteure (Trainer, Sportwissenschaftler, Athletiktrainer, Leistungsdiagnostiker) in diesem Tätigkeitsfeld dazu ermutigen, ebenfalls sportartspezifisch zu testen, um die Leistungsfähigkeit der Spieler und die Wirksamkeit von Trainingsinterventionen valide beurteilen zu können.

Background This study assessed the validity of the handball-specific complex test (HBCT) and two non-specific field tests in professional elite handball athletes, using the match performance score (MPS) as the gold standard of performance. Methods Thirteen elite male handball players (age: 27.4±4.8 years; premier German league) performed the HBCT, the Yo-Yo Intermittent Recovery (YYIR) test and a repeated shuttle sprint ability (RSA) test at the beginning of pre-season training. The RSA results were evaluated in terms of best time, total time, and fatigue decrement. Heart rates (HR) were assessed at selected times throughout all tests; the recovery HR was measured immediately post-test and 10 minutes later. The match performance score was based on various handball specific parameters (e.g., field goals, assists, steals, blocks, and technical mistakes) as seen during all matches of the immediately subsequent season (2015/2016). Results The parameters of run 1, run 2, and HR recovery at minutes 6 and 10 of the RSA test all showed a variance of more than 10% (range: 11-15%). However, the variance of scores for the YYIR test was much smaller (range: 1-7%). The resting HR (r2=0.18), HR recovery at minute 10 (r2=0.10), lactate concentration at rest (r2=0.17), recovery of heart rate from 0 to 10 minutes (r2=0.15), and velocity of second throw at first trial (r2=0.37) were the most valid HBCT parameters. Conclusions Much effort is necessary to assess MPS and to develop valid tests. Speed and the rate of functional recovery seem the best predictors of competitive performance for elite handball players.

The purpose of our study was to find out the results of a training program based on the Olympic exercises (weightlifting), on the performance of strength and power in high-level table tennis players. Thirty elite table tennis players (age 18.05 ± 1.04 years) were randomly divided into a control group (CG; n = 15) and an experimental group (WRTG; n = 15). The last group followed a weightlifting training program for 6 weeks with 3 sessions per week during the competitive period. As for the control group, he pursued classical table tennis training. Before and after the 6-week training program, all players have conducted tests on sprint distance of 5 m, the vertical jump (squat jump and countermovement jump), strength hand grip, throwing medicine Ball, the 1-RM bench press and 1-RM 1/2 squat test. A slight raise in the 1-RM maximum strength of upper and lower limbs (respectively p < 0.05; 7.87 kg or 8.29% and p < 0.04; +10.7 kilograms or 17.75%) for the WRTG compared to CG this evolution was followed by an obvious changes in strength hand grip at the EG compared to CG (p < 0.01; 4.6 kg or 13.54% of development). According to the outcomes of our study, we can declare that a strength training program during three sessions per week during the competitive period, can lead to a developed strength in the maximum lower limb, the and vertical jump among the elite table tennis players. The identification such as results could be considered a reliable device for coaches and technicians concerned to develop the performance of their table tennis players.

Handball athletes are routinely exposed to direct and indirect trauma to their throwing shoulder. Due to the violent and repetitive nature of the throwing motion, these athletes also commonly present with functional adaptations of the throwing shoulder that stem from osseous and soft tissue structural changes. These functional adaptations may include decreased internal rotation ROM, increased external rotation ROM, decreased external rotation strength, and scapular dyskinesis. Although these are common adaptations among handball athletes, such changes can have detrimental effects, often leading to injury and time lost from competition, when they are not managed correctly through preventative exercises or with drastic decreases in playing volume.

Hermassi, S, Wollny, R, Schwesig, R, Shephard, RJ, and Chelly, MS. Effects of in-season circuit training on physical abilities in male handball players. J Strength Cond Res 33(4): 944-957, 2019-This study analyzed the effects of a resistance-type circuit training (RCT) program (30-35 minutes, performed twice a week for 10 weeks) on male handball players. Twenty-two male players were divided into experimental (E; age 20.3 ± 0.5 years) and control groups (C; age 20.1 ± 0.5 years). Measures before and after RCT included squat jump (SJ), countermovement jump (CMJ), 1 repetition maximum (1RM) of bench press, pull-over and back half-squats, throwing velocity (a 3-step running throw [RT], and a jump throw [JT]), repeated-sprint ability (six 2 × 15-m shuttle sprints with recording of best time for a single trial), anthropometric estimates of leg- and thigh-muscle volumes and mean thigh cross-sectional area (CSA), and a test of agility. The agility T-half test showed a significant interaction effect (p = 0.001; η = 0.422), with an intergroup difference in effect size (d) of 1.27 (dTG = 1.24 vs. dCG = -0.03). The SJ displayed no interaction effect. The interaction effects for half back squat (d = 2.73, η = 0.740) and CMJ (d = 3.76, η = 0.700) were large, but that for RT was smaller (η = 0.460) than that for JT (η = 0.745). The throwing velocity of C decreased for both measures, with negative effect sizes (d = -0.18 and d = -0.93, respectively). Upper-body, leg, and thigh-muscle volumes and thigh CSA increased significantly after resistance training. However, repeated-sprint parameters showed no significant changes. During the competitive season, 10 weeks of RCT with only 2 training sessions per week improved numerous measures of athletic performance in handball players, and such conditioning can be highly recommended as part of the annual training program for elite handball players.

Background Team handball is an intense ball sport with specific requirements on technical skills, tactical understanding, and physical performance. The ability of handball players to develop explosive efforts (e. g. sprinting, jumping, changing direction) is crucial to success. Objective The purpose of this pilot study was to examine the effects of an in-season high-intensity strength training program on the physical performance of elite handball players. Materials and methods Twenty-two handball players (a single national-level Tunisian team) were randomly assigned to a control group (CG; n = 10) or a training group (TG; n = 12). At the beginning of the pilot study, all subjects performed a battery of motor tests: one repetition maximum (1-RM) half-squat test, a repeated sprint test [6 × (2 × 15 m) shuttle sprints], squat jumps, counter movement jumps (CMJ), and the Yo-Yo intermittent recovery test level 1. The TG additionally performed a maximal leg strength program twice a week for 10 weeks immediately before engaging in regular handball training. Each strength training session included half-squat exercises to strengthen the lower limbs (80 – 95 % of 1-RM, 1 – 3 repetitions, 3 – 6 sets, 3 – 4 min rest between sets). The control group underwent no additional strength training. The motor test battery was repeated at the end of the study interventions. Results In the TG, 3 parameters (maximal strength of lower limb: η² = 0.74; CMJ: η² = 0.70, and RSA best time: η² = 0.25) showed significant improvements, with large effect sizes (e. g. CMJ: d = 3.77). A reduction in performance for these same 3 parameters was observed in the CG (d = -0.24). Conclusions The results support our hypothesis that additional strength training twice a week enhances the maximal strength of the lower limbs and jumping or repeated sprinting performance. There was no evidence of shuttle sprints ahead of regular training compromising players’ speed and endurance capacities.

BACKGROUND This study assessed inter-relationships between shuttle and straight repeated-sprint ability tests and the relationship of each measure to anthropometric and explosive lower limb performance data in elite handball players. METHODS Twenty-two elite male handball players (18.9±0.2 years; body mass: 83.3±1.1 kg, height: 1.79±2.30 m, body fat: 12.8±0.2%) completed tests that included a lower limb force-velocity test of peak power (Wpeak), jumping ability (squat and counter-movement jumps; SJ, CMJ), 1 repetition maximum (1-RM) half back squat, average sprint velocity over 5 m (V-5 m), peak velocity between 25-30 m (Vmax), and Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), and anthropometric determinations of cross-sectional areas and muscle volumes for leg and thigh muscles. Data were compared with performance on two repeated sprint tests; the straight test (6 × 30 m [RSA30]) and the intermittent test (6×[2×15 m] shuttle sprints [RSA15]). RESULTS V-5 m, 1-RM, and thigh and leg muscle cross-sectional areas and volumes showed relevant relationships to the shuttle RSA test (r2≥0.5). The Yo-Yo IR1 explained the largest percentage of variance in RSA15 total time (60%), and V-5 m also explained 56% of the variance in RSA15 total time. RSA15% fatigue was only related to 1-RM (explained variance: 58%), and the RSA30 test showed no useful correlations with any of the investigated predictors. Multiple-regression analyses using all physical tests explained 91% of the variance in RSA15 total time (P

BACKGROUND We aimed to examine the validity of an ice hockey-specific complex test (IHCT) and nonspecific off-ice tests for sports performance. METHODS Eighteen professional athletes (27.4±6.0 years) underwent the IHCT, maximal strength squat tests, an endurance cycling test (PWC 170) and posturography during in the first week of the pre-seasonal training. The IHCT included parameters of load (e.g., 10-m and 30-m sprint, transition and weave agility without and with puck, slap and wrist shots before and after the test). The players were closely accompanied during the season of competition (seven months) in order to collect match performance data. Based on these data, we calculated a match performance score (MPS) for each player. RESULTS Stability indicator (r2=0.39), weave agility with puck (r2=0.39), maximal relative squat (r2=0.37) and frequency band F7-8 (r2=0.35) proved to be the most valid tests. However, with the MPS as dependent variable, 21 of 44 parameters tested (48%) explained 10% or more of variance. CONCLUSIONS The current findings suggest that postural stability, cerebellar control mechanisms and concentric maximum leg strength are the most important predictors of MPS. Regarding IHCT, actions with the puck under fatigue conditions and the ability to recover quickly are highly relevant for ice hockey players.

Effects of 8-week in-season plyometric training on upper and lower limb performance of elite adolescent handball players. J Strength Cond Res 28(5): 1401-1410, 2014-We hypothesized that replacement of a part of the normal in-season regimen of top-level adolescent handball players by an 8-week biweekly course of lower and upper limb plyometric training would enhance characteristics important to competition, including peak power output (W-peak), jump performance, muscle volume, and ball throwing velocity. Study participants (23 men, age: 17.4 +/- 0.5 years, body mass: 79.9 +/- 11.5 kg, height: 1.79 +/- 6.19 m, body fat: 13.8 +/- 2.1%) were randomly assigned between controls (C; n = 11) and an experimental group (E, n = 12). Measures preintervention and postintervention included force-velocity ergometer tests for upper (W-upper peak) and lower limbs (W-lower peak), force platform determinations of squat jump (SJ) and countermovement jump (CMJ) characteristics (jump height, maximal force, initial velocity, and average power), video filming of sprint velocities (first step [V-1S], first 5 m [V-5m], and 25-30 m [V-max]), and anthropometric estimates of leg muscle volume. E showed gains relative to C in W-upper peak and W-lower peak (p < 0.01 and p < 0.001), SJ (height p < 0.01; force p

This study assessed the impact of 8 weeks biweekly in-season weightlifting training on the strength, throwing ability, and body composition of healthy male handball players. Twenty players (age: 21.2 &plusmn, 0.7 years, height: 1.83 &plusmn, 0.08 m, body mass: 83.3 &plusmn, 7.5 kg, body fat: 13.2 &plusmn, 1.4%, upper limb muscle volume: 3.16 &plusmn, 0.16 L) were randomly allocated between experimental (EG) and control (CG) groups. Measures of one-repetition maximal strength included bench press, pull-over, snatch, and clean and jerk. Throwing velocity was investigated by standing, running, and jump throws, and the power of the upper limbs was estimated from the total distance of a 3-kg medicine ball overhead throw. Muscle volumes were estimated anthropometrically. Training sessions comprised 3&ndash, 4 sets of explosive weightlifting exercise at 75%&ndash, 90% of 1RM (repetition maximum). Significant interaction effects (time x group) were found for all strength and throwing variables, ranging from &eta, p2 = 0.595 (pull-over) to &eta, p2 = 0.887 (medicine ball throw), with the largest between-group difference (more than 40%, &Delta, d = 6.65) and effect size (d = 6.44) for the medicine ball throw, and the smallest (about 23%, &Delta, d = 1.61) for the standing shot performance. Significant interaction effects were also detected for all anthropometric parameters (body mass: &eta, p2 = 0.433, body fat: &eta, p2 = 0.391, upper limb muscle volume: &eta, p2 = 0.920, with an almost 20% gain of muscle volume). It can be concluded that 8 weeks of biweekly in-season weightlifting training yielded substantial increases of muscle volume, maximal strength of the upper limbs, and ball throwing velocity in healthy handball players relative to their standard training program.

The behavior of cooperative teacher’s for integration into professional life was largely influenced by human relationships with other teachers and administrative staff. Firstly, our studies aimed to identify the interactions developed during the presence of cooperative teacher’s (CT) in the preparatory training for working life. Secondly, we ask to know how the masters of the course actually help to integrate training against the constraints that were imposed on his entourage. For this reason we base our analysis on a questionnaire consisting of ten questions that are the elements that make up the scale to clarify the latent construct “the integration of CT in professional life” and semi-directive interviews. The value of Cronbach alpha index is 0.772. Therefore, we can say that we get to this scale that consists of ten questions, satisfactory internal consistency. Our data were collected in the end of the course and interviews with ten physical education student teachers (PE-STs) at the Higher Institute of Sport and Physical Education (ISSEP) in Tunisia. They all mixed classes of Level 1 and 2 (first and second year of secondary school) teach. These interviews were semi-structured (30 minutes) and gave the PE-STs opportunity to distribute their views on major issues such as the satisfaction of the integration, management, as well as more succinct topics such as difficulties that occurred all along the path of integration. The data were analyzed using a constant comparison. However, three main issues have emerged of responses that illustrate the PE-STs’ satisfactions, and it’s their integration into working life, the definition of the objectives of the course and the role of CT (monitors and internship supervisor). This study revealed three major advanced by PE-STs conceptions: 1) the satisfaction of the integration (45%); 2) supervision (51.2%); and 3) knowledge of the objectives of the course (28.8%). The issues addressed in this paper will encourage educators to reflect on their own coaching practices and to include them in the process of accompanying PE-STs.

The present paper investigated the effects of a shoot training programme with a reduced hoop diameter (0.35 m) rim on kinematics and performance of basketball free-throws. Eighteen young male basketball players were divided into control (CG, n = 9) and experimental (EG, n = 9) groups. Both groups undertook a 10-week training programme comprising two training sessions per week. Under fatigued conditions, each participant shot 150 free-throws in each training session, with the CG using a standard rim, and the EG a smaller rim. All other training was identical between groups. Ball release parameters, player's kinematics and mean of successful free-throws (out of 150 attempts) were determined for each participant, before and after completion of the training programme. Following training, a significant increase (P < 0.05) in ball release angle, speed and height and in shoulder joint angle at release (P < 0.01) was observed for the EG. Both the CG (P < 0.001) and the EG (P < 0.0001) showed an increase in the number of successful free throws, although the increase was greater (P < 0.05) for the EG (22.7 ± 6.4 free throws) than for the CG (14.6 ± 7.8 free throws). We conclude that training with a reduced rim significantly improves free-throw performance in young basketball players.

Background The primary aim of the study was to examine the anthropometric characteristics as well as throwing and sprinting performance of professional handball players classified by playing position and competition level. Methods 21 male players (age: 25.2±5.1 years) from the first German handball league (FGL) and 34 male players (age: 26.1±4.1 years) from the third German handball league (TGL) were categorized as backs, pivots, wings and goalkeepers. Measurements included anthropometric data (height, mass and body mass index (BMI)), throwing and sprinting performance selected out of a complex handball test (HBCT), which was conducted twice (2 rounds). During the HBCT, the subjects performed two sprints (10, 20 m), two standing throws with run-up (ST) and four vertical jump throws (VJT) over a hurdle (20 cm) with and without precision for goal shot. Results The anthropometric data revealed a significantly (P=0.038 and η2=0.079) shorter body height for TGL than for FGL players. In the cohort of first league athletes the pivots were the tallest (1.98±0.04 m), backs in the third league showed the maximum body height (1.90±0.05 m). Regarding body mass, pivots were the heaviest players independent from the league membership. The FGL players showed a significantly (P 0.10) higher throwing velocity in all type of throws. Body height was significantly related to ST (r=0.53) and VJT (r=0.52) in the first round of HBCT but only for the FGL athletes. Throwing velocity was also correlated with BMI (r=-0.50) among the TGL players. Conclusions Substantial differences of body characteristics, throwing and sprinting performance between playing positions and competitive levels underline the importance of a careful scouting and position-specific training for professional handball players.

Background This study examined the effects of a 7-week in-season aerobic and high-intensity interval-training program on performance tests linked to successful handball play (e.g., repeated sprint and jumping ability). Methods Thirty participants (age 17.0±1.2 years, body mass 81.1±3.4 kg, height 1.82±0.07 m) performed a Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1), a squat (SJ) and a Countermovement Jump Test (CMJ), as well as a repeated Sprint Ability Test (RSA). From this, maximal aerobic speed (MAS, reached at the end of the Yo-Yo IR1), jumping ability, best time in a single sprint trial (RSAbest), total time (RSATT) and the performance decrement (RSAdec) during all sprints were calculated. Later, subjects were randomly assigned to a control group (CG; N.=15) performing their normal training schedule (5 weekly sessions of ~90 minutes of handball training) or an experimental group (EG; N.=15). The EG performed two 30 min sessions per week of high-intensity aerobic exercises at 100-130% of MAS in addition to their normal training schedule. Results A significant improvement in MAS (d=4.1), RSAbest (d=1.9), RSATT (d=1.5) and RSAdec (d=2.3) after the training period was demonstrated. Also, significant interaction effects (time x group) were found for all parameters as the EG significantly improved performances in all tests after training. The greatest interaction effects were observed in MAS (η2=0.811) and CMJ (η2=0.759). No relevant changes in test performances were found in the CG (mean d=-0.02). Conclusions These results indicate that individually speed-controlled aerobic and interval training is effective for improving specific handball performance.

BACKGROUND The aims of the study were to examine the anthropometric and physical performance characteristics of professional handball players classified by playing position. METHODS Twenty-one competitors (age: 25.2±5.1 years) were categorized as backs, pivots, wings or goalkeepers. Measures included anthropometrics (body height and mass), scores on the Yo-Yo Intermittent Recovery Test (total distance covered, TD), repeated-sprint ability (6 repetitions of 2x15-m shuttle sprints with recording of best time for a single trial, RSAbest) and performance on a complex handball test (HBKT) of throw slap (TS) and throw jump (TJ) with and without precision. RESULTS The anthropometric data revealed a significantly lower body height for wings and pivots than for goalkeepers. Wings, pivots and goalkeepers were significantly shorter than backs, but had a similar BMI. The TD was greater for the wings (2.400 m) than for backs (1.832 m) and pivots (2.067m). Wings also achieved a better RSAbest (5.41 s) than backs (5.68 s) or pivots (5.82 s). Body height was significantly related to throw slap (TS) and jump (JT) (r=0.53, P

Schwesig, R, Hermassi, S, Wagner, H, Fischer, D, Fieseler, G, Molitor, T, and Delank, K-S. Relationship between the range of motion and isometric strength of elbow and shoulder joints and ball velocity in women team handball players. J Strength Cond Res 30(12): 3428-3435, 2016-The aims of this study were to investigate relationships between isometric strength and range of motion (ROM) of shoulder and elbow joints and compare 2 different team handball throwing techniques in women team handball. Twenty highly experienced women team handball players (age: 20.7 ± 2.9 years; body mass: 68.4 ± 6.0 kg; and height: 1.74 ± 0.06 m) participated in this study. The isometric strength (hand-held dynamometer) and ROM (goniometer) of shoulder and elbow joints were measured at the beginning of the preseasonal training. After clinical examination, the subjects performed 3 standing throws with run-up (10 m) and 3 jump throws over a hurdle (0.20 m). The mean ball velocity was calculated from 3 attempts and measured using a radar gun. The results showed that the ball velocity of the standing throw with run-up (vST) was significantly higher than that of the jump throw (vJT) (25.5 ± 1.56 vs. 23.2 ± 1.31 m·s; p0.001). Therefore, significant playing position effects (p = 0.021) were only found for ST. Goalkeepers (n = 2) had the lowest (22.6 ± 0.04 m·s) and backcourt players (n = 9), the highest (26.1 ± 1.36 m·s) vST. The retroversion strength in the shoulder was the only parameter with relevant correlations to both throws (vST: r = 0.52, and vJT: r = 0.43). Other relevant relationships to vJT were found for adduction strength shoulder (r = 0.55) and ROM flexion elbow (r = -0.54). The vST was only correlated to the glenohumeral internal rotation deficit. As a consequence, strength is more important than the ROM, and in addition to this, the shoulder, compared with the elbow, has a greater influence on the vST in highly experienced women team handball players.

Performance over very short distances (1-5 m) is important in soccer. We investigated this in 23 male regional-level soccer players aged 17.2 +/- 0.7 years, filming body markers to determine the average velocity and acceleration over the first step (V(S) and A(S)) and the first 5 m (V(5), A(5)). Data were related to scores on a force-velocity test, squat jump (SJ), countermovement jump (CMJ), and 1 maximal repetition (1 RM) half back squat. Leg and thigh muscle volumes were also assessed anthropometrically. V(5) was positively correlated with leg and thigh muscle volumes (r = 0.61, p < 0.05; r = 0.43, p < 0.05, respectively), SJ power (absolute and relative to body mass, r = 0.45, p < 0.05; r = 0.43, p < 0.05, respectively), absolute force-velocity leg power (r = 0.49, p < 0.05), and 1 RM half back squat (r = 0.66, p < 0.001). The use of dimensional exponents did not change coefficients materially. V(S) was also correlated with leg muscle volume and 1 RM back half squat (r = 0.56, p < 0.01; r = 0.58, p < 0.01, respectively) and more weakly with force-velocity leg power and SJ force (r = 0.49, p < 0.05; r = 0.46, p < 0.5, respectively). However, the CMJ was unrelated to velocity or acceleration. Sprinting ability is correlated with measures of power and force such as the force-velocity test, SJ, and 1 RM half back squat; such measures thus offer useful guidance to soccer coaches who wish to improve the short-distance velocity of their players.

The aim of the present study was to investigate relationships between a performance index derived from the Yo-Yo Intermittent Recovery Test level 1 (Yo-Yo IR1) and other measures of physical performance and skill in handball players. The other measures considered included peak muscular power of the lower limbs (Wpeak), jumping ability (squat and counter-movement jumps (SJ, CMJ), a handball skill test and the average sprinting velocities over the first step (VS) and the first 5 m (V5m). Test scores for 25 male national-level adolescent players (age: 17.2 ± 0.7 years) averaged 4.83 ± 0.34 m·s-1 (maximal velocity reached at the Yo-Yo IR1); 917 ± 105 Watt, 12.7 ± 3 W·kg-1 (Wpeak); 3.41 ± 0.5 m·s-1 and 6.03 ± 0.6 m·s-1 (sprint velocities for Vs and V5m respectively) and 10.3 ± 1 s (handball skill test). Yo-Yo IR1 test scores showed statistically significant correlations with all of the variables examined: Wpeak (W and W·kg-1) r = 0.80 and 0.65, respectively, p≤0.001); sprinting velocities (r = 0.73 and 0.71 for VS and V5m respectively; p≤0.001); jumping performance (SJ: r = 0.60, p≤0.001; CMJ: r= 0.66, p≤0.001) and the handball skill test (r = 0.71; p≤0.001). We concluded that the Yo-Yo test score showed a sufficient correlation with other potential means of assessing handball players, and that intra-individual changes of Yo-Yo IR1 score could provide a useful composite index of the response to training or rehabilitation, although correlations lack sufficient precision to help in players’ selection.

We studied the effect of supplementing normal in-season training by a 10-week lower limb plyometric training program (hurdle and depth jumping), examining measures of competitive potential (peak power output [PP], sprint running velocity, squat jump [SJ], countermovement jump [CMJ], drop jump [DJ], and lower limb muscle volume). The subjects (27 male track athletes, aged 11.9 ± 1.0 years; body mass: 39.1 ± 6.1 kg; height: 1.56 ± 0.02 m; body fat: 12.8 ± 4.4%) were randomly assigned between a control (normal training) group (C; n = 13) and an experimental group (E; n = 14) who also performed plyometric training 3 times per week. A force-velocity ergometer test determined PP and SJ, and an Optojump apparatus evaluated CMJ height and DJ (height and power). A multiple-5-bound test assessed horizontal jumping, and video-camera analyses over a 40-m sprint yielded velocities for the first step (VS), the first 5 m (V5m), and between 35 and 40 m (Vmax). Leg muscle volume was estimated anthropometrically. Experimental group showed gains relative to C in SJ height (p < 0.001); CMJ height (p < 0.01); DJ height and power relative to body mass (p < 0.01 for both); and all sprint velocities (p < 0.01 for VS and V(5m, p) ≤ 0.05 for Vmax). There was also a significant increase (p < 0.01) in thigh muscle volume, but leg muscle volume, thigh cross-sectional area, and PP remained unchanged. We conclude that adding plyometric training improved important components of athletic performance relative to standard in-season training in young runners.

The purpose of this study was to compare the effect of a specific resistance training program (throwing movement with a medicine ball) with that of regular training (throwing with regular balls) on ball velocity, anthropometry, maximal upper-body strength, and power. Thirty-four elite male team handball players (age: 18 ± 0.5 years, body mass: 80.6 ± 5.5 kg, height: 1.80 ± 5.1 m, body fat: 13.4 ± 0.6%) were randomly assigned to 1 of the 3 groups: control (n = 10), resistance training group (n = 12), or regular throwing training group (n = 12). Over the 8-week in season, the athletes performed 3 times per week according to an assigned training program alongside their normal team handball training. One repetition maximum (1RM) bench press and 1RM pullover scores assessed maximal arm strength. Anthropometry was assessed by body mass, fat percentage, and muscle volumes of upper body. Handball throwing velocity was measured by a standing throw, a throw with run, and a jump throw. Power was measured by measuring total distance thrown by a 3-kg medicine ball overhead throw. Throwing ball velocity, maximal strength, power, and muscle volume increases for the specific resistance training group after the 8 weeks of training, whereas only maximal strength, muscle volume and power and in the jump throw increases were found for the regular throwing training group. No significant changes for the control group were found. The current findings suggest that elite male handball players can improve ball velocity, anthropometrics, maximal upper-body strength, and power during the competition season by implementing a medicine ball throwing program.

The aims of this study were to test the potential of in-season heavy upper and lower limb strength training to enhance peak power output (Wpeak), vertical jump, and handball related field performance in elite male handball players who were apparently already well trained, and to assess any adverse effects on sprint velocity. Twenty-four competitors were divided randomly between a heavy resistance (HR) group (age 20 ± 0.7 years) and a control group (C; age 20 ± 0.1 years). Resistance training sessions were performed twice a week for 8 weeks. Performance was assessed before and after conditioning. Peak power (W(peak)) was determined by cycle ergometer; vertical squat jump (SJ) and countermovement jump (CMJ); video analyses assessed velocities during the first step (V(1S)), the first 5 m (V(5m)), and between 25 and 30 m (V(peak)) of a 30-m sprint. Upper limb bench press and pull-over exercises and lower limb back half squats were performed to 1-repetition maximum (1RM). Upper limb, leg, and thigh muscle volumes and mean thigh cross-sectional area (CSA) were assessed by anthropometry. W(peak) (W) for both limbs (p < 0.001), vertical jump height (p < 0.01 for both SJ and CMJ), 1RM (p < 0.001 for both upper and lower limbs) and sprint velocities (p < 0.01 for V(1S) and V(5m); p < 0.001 for V(peak)) improved in the HR group. Upper body, leg, and thigh muscle volumes and thigh CSA also increased significantly after strength training. We conclude that in-season biweekly heavy back half-squat, pull-over, and bench-press exercises can be commended to elite male handball players as improving many measures of handball-related performance without adverse effects upon speed of movement.

The purposes of this study were to examine the activity profile of elite adolescent players during regular team handball games and to compare the physical and motor performance of players between the first and second halves of a match. Activity patterns (video analysis) and heart-rate (HR) responses (telemetry) were monitored in top national-division adolescent players (18 men, aged 15.1 ± 0.6 years) throughout 6 regulation games (25-minute halves with a 10-minute interval). The total distance covered averaged 1,777 ± 264 m per game (7.4% less in the second than in the first half, p > 0.05). Players ran 170 ± 24 m at high intensity and 86 ± 12 m at maximal speed, with 32 ± 6 bouts of running (duration 2.3 ± 0.3 seconds) at speeds > 18 km·h(-1); they stood still for 16% of the playing time. The mean HR during play was 172 ± 2 b·min(-1) (82 ± 3% of maximal HR). Blood lactate concentrations at the end of the first and second halves were 9.7 ± 1.1 and 8.3 ± 0.9 mmol·L(-1), respectively (difference p < 0.05). We conclude that adolescent handball players cover less distance and engage in fewer technical actions in the second half of a match. This indicates that team handball is physiologically very demanding. The practical implication is that coaches should seek to sustain performance in the second period of a game by modifying playing tactics and maximizing both aerobic and anaerobic fitness during training sessions.

Our hypothesis was that the addition of an 8-week lower limb plyometric training program (hurdle and depth jumping) to normal in-season conditioning would enhance measures of competitive potential (peak power output [PP], jump force, jump height, and lower limb muscle volume) in junior soccer players. The subjects (23 men, age 19 ± 0.7 years, body mass 70.5 ± 4.7 kg, height 1.75 ± 0.06 m, body fat 14.7 ± 2.6%) were randomly assigned to a control (normal training) group (Gc; n = 11) and an experimental group (Gex, n = 12) that also performed biweekly plyometric training. A force-velocity ergometer test determined PP. Characteristics of the squat jump (SJ) and the countermovement jump (CMJ) (jump height, maximal force and velocity before take-off, and average power) were determined by force platform. Video-camera kinematic analyses over a 40-m sprint yielded running velocities for the first step (VS), the first 5 m (V5m) and between 35 and 40 m (Vmax). Leg muscle volume was estimated using a standard anthropometric kit. Gex showed gains relative to controls in PP (p < 0.01); SJ (height p < 0.01; velocity p < 0.001), CMJ (height p < 0.001; velocity p < 0.001, average power p < 0.01) and all sprint velocities (p < 0.001 for V5m and Vmax, p < 0.01 for VS). There was also a significant increase (p < 0.05) in thigh muscle volume, but leg muscle volume and mean thigh cross-sectional area remain unchanged. We conclude that biweekly plyometric training of junior soccer players (including adapted hurdle and depth jumps) improved important components of athletic performance relative to standard in-season training. Accordingly, such exercises are highly recommended as part of an annual soccer training program.