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Previously, it was suggested that biological maturation (BM) could be linked to cardiac autonomic recovery (CAR) in the pediatric population. However, this influence hasn't been confirmed yet. Our aim was to investigate the impact of BM on CAR in female volleyball players. Experimental study with a sample of 38 volleyball players, comprising 20 girls (age: [11.6 ± 2.1] years) and 18 women (age: [24.5 ± 5.5] years), we analyzed BM, comparing maturing subjects (girls) with mature subjects (women). Additionally, we assessed peak height velocity (PHV) in girls. We conducted a training session involving repeated sprints (3 rounds of 6 sprints interspersed by 5 min [min] of passive rest). Using short-range radio telemetry, we analyzed CAR during (at the end of the 1st and 2nd rounds) and after (following the 3rd round) the training session of repeated sprints by applying the 60-s to 300-s heart rate recovery index (HRR-Index). Girls exhibited superior CAR compared to women (round 2: 60-s, 120-s, 240-s, and 300-s, p < 0.005). Subgroup analyses of BM indicated that individuals in the Late-PHV stage demonstrated superior CAR compared to those in the Early-PHV and During-PHV groups. (60-s to 300-s, η²p > 0.4, p < 0.05). Subjects in the During-PHV stage were superior to those in the Early-PHV stage (240-s á 300-s, η² p > 0.4, p < 0.05). We have concluded that biological maturation has a significant impact on cardiac autonomic recovery. [ABSTRACT FROM AUTHOR]

Introduction: Themenstrual cyclemay affectwell-being and physical performance of elite female athletes by interfering with the function of multiple physiological systems. The aim of this study was to characterize the symptoms of the menstrual cycle and their frequency in elite female volleyball players. Methods: Twenty professional female volleyball players were instructed to track their menstrual symptoms over the course of the first German national league season using the FitrWoman® tracking app. The app recorded the cycle length, duration, and intensity of the period as well as the occurrence and frequency of frequent cycle symptoms. The reported symptoms were then categorized into four categories (frequently, sometimes, rare, never) in order to create an individual Menstrual Symptom index (MSi) for each athlete. Results: The most frequently occurring symptoms among all players without hormonal contraception (non-HC; n=15) were "stomach cramps" (n=15), "sleep disturbances" (n=11), and "tiredness" (n = 11). The average number of symptoms counted per cycle was 11.8 (±17.7) and the average calculated MSi within the team was 12.9 (±10.7) points for non-HC users. The HC players (n = 4) also regularly experienced symptoms such as "sleep disturbances" or "tendered breasts". The most common symptoms "stomach cramps" and "disturbed sleep" occurred more frequently during menstruation, while symptoms such as "bloating", "cravings" or "tendered breasts" did also peak before menstruation. Discussion: Menstrual cycle symptoms can be highly individual within a professional sports team. The calculation of the MSi seems to be a simple and accessible method to describe and overview the intensity and prevalence of symptoms in top female athletes in sports games. [ABSTRACT FROM AUTHOR]

Specific learning experiences are vital for athletes to continuously interact with developing knowledge of the performance environment, through the refined design of representative learning contexts (ecological paradigm), and appropriate didactical interventions (constructivist paradigm). Although there is a well-established relationship between tactical knowledge (TK) and tactical behaviours (TB), research has investigated the development of both separately. Thus, the inter-dependency between knowledge and behaviour has been inferred, but not contextually interpreted in a process-oriented analysis of performance. Through an insider action-research (AR) design, and adopting a mix-methods approach, this study aimed to: (i) investigate in-depth the influence of a constructivist-ecological pedagogical intervention on developing players' TK and TB; (ii) explore effects of integrated tactical knowledge and behaviour on competitive performance. Fifteen female volleyballers participated in this study. An insider-AR (first author assumed the dual role of coach and researcher) was conducted from September 2017 to June 2018. In total, four AR-cycles were completed. A mixed-method approach was used to obtain distinct, but complementary, data on the impact of a constructivist-ecological pedagogical intervention on development of players' TK and TB. Qualitative data were used to explore the development of TK, while TB was analysed through quantitative methods. Qualitative data on the coach's perceptions were collected using a reflexive diary and field notes, while players' perceptions were recorded through four semi-structured focus-group interviews, one per AR-cycle. Quantitative data from four official competitive matches, one per AR-cycle, were analysed. Players' positional coordinates were used to calculate the synchronisation tendencies of lateral blocking and defensive lines through the cluster-phase method. Qualitative data were analysed using thematic analysis, in which inductive procedures deepened understanding of the development of the players' TK. A 4 (matches) x 1 (court direction) repeated-measures ANOVA was used to analyse quantitatively the differences in the mean cluster-amplitude values of lateral blocking and defensive lines between matches. The unique integration of constructivist and ecological principles scaffolded the development of players' TK and TB. Players evolved from an initial stage in which they verbally described competitive game scenarios (using knowledge about environment), to an endpoint where they revealed superior tactical understanding and action intentionality. Increments in tactical complexity favoured the development of TK and TB in a long-term analysis. However, over the short-term, TB was reduced. The development of players' TK (supported by interactions yielding knowledge of practice and performance environments) shaped a basis for the acquisition of co-adaptive TB during competitive performance. First, sport practitioners could benefit from combining strategies from different theoretical approaches so that they can satisfy the daily needs of athletes in practice. Second, we advise coaches to adopt didactical and representative learning designs, grounded on video analysis and the co-creation of game-plans. Third, the data imply that time and the continuous exposure of players to meaningful and representative practice tasks in learning environments are needed so that athletes can enrich their tactical behaviours, using knowledge of the performance environment to interact effectively its constraints. [ABSTRACT FROM AUTHOR]

Purpose: The aim of this study was to assess the reliability and validity of the My Jump 2® app in measuring jump height, flight time, and peak power among elite women beach volleyball players on sand surfaces. Methods: Eleven elite female beach volleyball players (aged 23.6 ± 6.2 years; weight 66.3 ± 5.8 kg; height 174.4 ± 5.8 cm; with 8.4 ± 4.8 years of professional experience) participated in this study. Each player performed six countermovement jumps in a wooden box filled with sand on a force platform while simultaneously recording a video for subsequent analysis using the My Jump 2® app. Results: We found excellent agreement for flight time, jump height and peak power between observers (ICC = 0.92, 0.91 and 0.97, respectively). No significant differences between force platform and My Jump 2® app were detected in the values obtained for the three variables (P > 0.05). For the force platform and the My Jump 2® app, we found a good agreement measuring jump height and flight time (ICC = 0.85 and 0.85, respectively). However, we only found a moderate agreement for peak power (ICC = 0.64). The difference in jump height showed a limit of agreement between −4.10 and 4.74 cm in Bland-Altman, indicating a high level of agreement between the two measurement tools. Conclusion: Based on our findings, the My Jump 2® app reveals a valid tool for measuring jump height and flight time of CMJ on sand surfaces. However, more caution is needed when measuring peak power. [ABSTRACT FROM AUTHOR]

Study purpose. This study aimed to investigate the effects of Knee Tuck Jump or Jump to Box plyometric training and to determine their effectiveness in increasing leg muscle strength and flexibility in female students participating in volleyball extracurriculars. Materials and methods. This study used a quasi-experimental design. Twenty-four female students were randomly selected as samples and then divided into two categories: 12 students receiving Knee Tuck Jump training (age: 17.08±0.51) and 12 students receiving Jump to Box training (age: 17.00±0.60). All participants performed the initial and final tests using the Vertical Jump and sit-and-reach tests. To analyze the data, the t-test was used to determine the differences in variables between the pretest and posttest in the experimental group. Results. In the Knee Tuck Jump group, a significant improvement in VJ (p = 0.000) and sit-&-reach tests (p = 0.000) was observed. In addition, Knee Tuck Jump was considered to be more effective in increasing the students' flexibility, because the t value of sit-&-reach test (14.075) was higher than that of VJ (13.811). Similarly, the Jump to Box group also showed a significant improvement in VJ (p = 0.000) and sit-&-reach (p = 0.000) tests. However, Jump to Box was deemed to be more effective in increasing the students' leg muscle strength, as the t value of VJ (26.086) was higher than that of sit-&-reach test (9.594). Conclusions. Based on the research findings, it can be concluded that plyometric exercises, specifically KTJ and JB, have a significant and positive impact on the lower limb muscle strength and flexibility in female students participating in volleyball extracurricular activities. Despite both demonstrating significant positive effects, KTJ training is more effective in improving flexibility compared to JB, while JB is more effective in enhancing lower limb muscle strength compared to KTJ. [ABSTRACT FROM AUTHOR]

Study aim(s): The study aims to determine the effect of arm swing technique and the elastic force stored in tendon during the eccentric phase of jumping on the vertical jump performance of Volleyball Players (U15). Methods: Ten U15 women volleyball players from KV Theranda, averaging 157.0 cm in height and 48.8 kg in weight, participated. Participants performed Countermovement Jumps (CMJ) and Squat Jumps (SJ), recorded at 240 fps on an iPhone 13 Pro using My Jump 3 application. Jump heights were calculated from selected take-off and landing frames. Data analysis using SPSS 26 included normality tests and T-tests to compare CMJ and SJ performance, focusing on arm technique and elastic force. Results: Based on the results, except for strength and power, which showed significant differences (p < 0.05), the analysis revealed a significant advantage for CMJ over SJ in all parameters (p < 0.05). This 70% difference is due to the elastic force in the tendons during the eccentric phase and arm momentum. Conclusions: Countermovement jumps (CMJ) significantly outperform squat jumps (SJ) due to the elastic force stored in tendons and arm momentum during the eccentric phase, resulting in a 70% performance difference. Cheraghi et al. (2017) emphasized peak power's role in higher jumps. Future research should separately analyze CMJ with and without arm movement to understand their impacts. [ABSTRACT FROM AUTHOR]

Copyright of Timisoara Physical Education & Rehabilitation Journal is the property of Sciendo and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Copyright of Italian Journal of Health Education, Sport & Inclusive Didactics is the property of Edizioni Universitarie Romane and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

In their structure, indoor sports require quick changes of movement direction. Players should possess a high level of ability to change the direction and speed of movement in response to a stimulus, which is one of the major prerequisites for a high level of performance. During a volleyball match, players are involved in different defensive and offensive activities in which agility plays an important role. The aim of this study was to determine the differences between less successful and more successful youth female volleyball players, as well as their inter-positional and intra-positional differences in agility. The study was conducted on a sample of 204 youth female volleyball players whose mean chronological age was 14.11±0.84 years. The players were divided into 5 subgroups according to their playing position (setters, opposite players, passer-hitters, middle blockers, and libero players). The variable sample used to assess agility consisted of 3 tests: Side steps, 9-3-6-3-9 test, and Step-hop test. Methods of data analysis included the determination of metric characteristics for all three agility tests. The analysis of covariance revealed a significant impact of biological age indicators on all agility tests. Furthermore, discriminant analysis of differences showed that more successful volleyball players achieved better results in all three agility tests. High reliability of the test was determined by Cronbach's Alpha coefficient (0.87-0.96). The results of this study showed a positive effect of agility tests in differentiating less successful and more successful players regardless of their position. More successful players achieved better results than less successful players in all tests. Greater biological maturity and training experience represent great competitive advantage in this age group. The obtained inter-positional and intra-positional differences and the influence of the biological age indicator on inter-positional and intra-positional differences in agility tests imply that higher biological maturity and training experience are great competitive advantages in this age group. The primary goal of training in younger age groups should not be the current success in the competition, but rather the preparation for achieving the best possible results in senior competition.. [ABSTRACT FROM AUTHOR]

Introduction. High physical fitness requirements in young athletes may lead to physical injuries. This study aimed to determine the influence of a core stability exercise program on the functional limitations of the musculoskeletal system in girls practising volleyball. Materials and Methods. 32 female players practising competitive volleyball in the Sport Club SMS Warsaw participated in this study. Group 1 (study group) comprised female volleyball players who, apart from training, performed stabilisation exercises from the developed program. Group 2 (control group) included players who did not perform any additional exercises. The assessment tool was the FMS test, comprising of 7 movement patterns scored on a scale of 0-3. Results. In the studied group of 32 volleyball players, at the first measurement, the average result of the FMS test amounted to 11.38 points. At the second measurement, considerably better results (p<0.001) were observed in the study group. Both the players in the study and control groups obtained the highest possible result of the pectoral girdle mobility test at both measurements. Conclusion. Stabilisation training may have a diminishing influence on functional limitations in women practising volleyball. The use of stabilisation exercises is recommended to prevent traumatic and overload-related bodily injuries. [ABSTRACT FROM AUTHOR]

In this research, the problem of somatotypes will be treated components, body composition and anthropometric characteristics in volleyball players with different level of performance. Namely, the research will be aimed at assessing the somatotype of the selected volleyball players, their body composition, anthropometric characteristics, as well as their mutual relations followed through the different level of performance. The main problem of this research is the differences in anthropometric characteristics, body composition and somatotype components between senior and cadet volleyball players. The subject of this research is certain anthropometric characteristics and body components, as well as determining the somatotype of the studied volleyball players with varying levels of success. The sample of respondents is drawn from a population of volleyball players from the volleyball clubs: "Shkendija", volleyball club "Bamikor", volleyball club "TE Volley" and volleyball club "Ljuboten" all from Tetovo aged 18 to 31 years ± 6 months. In the research are included 64 female volleyball cadets aged 18 and 19 and 126 senior female volleyball players aged 20 to 31 years ± 6 months. A cross-sectional study was performed on the sample of respondents; the anthropometric, body and somatotype components in young volleyball players from this region of the Republic of North Macedonia. In this research, a total of 29 variables were applied, of which 18 were variables for assessment of anthropometric characteristics, 8 variables for assessment of the body composition and 3 variables for the assessment of somatotypicity in the chosen volleyball players. [ABSTRACT FROM AUTHOR]

While being an integral part of both the offensive and defensive segments of the game, the biomechanical parameters of setting motions remain understudied in the scientific literature. Thus, the purpose of the present study was to examine differences in kinetic and kinematic characteristics between: (a) three types of setting motions (i.e., front, middle, back); (b) two types of setting approaches (i.e., stationary, step-in); and (c) proficient (PRO) and non-proficient (N-PRO) volleyball players. Twenty recreationally active females performed five stationary and five step-in setting approaches to Zone 4–2 in a randomized order. Uni-dimensional force plate sampling at 1000 Hz and high-definition camera recording at 30 fps were used to obtain kinetic and kinematic variables of interest. The total number of setting attempts performed by each subject was 30, accounting for a grand total of 600 attempts. PRO setters had less knee flexion, shoulder flexion, and ankle dorsiflexion at the initial concentric phase of the volleyball setting motion when compared to the N-PRO setters. Moreover, significantly greater peak concentric and landing forces, impulse, rate of force development, and vertical jump height were observed for PRO setters compared to N-PRO setters, while no significant differences were found between different setting targets and approaches. [ABSTRACT FROM AUTHOR]

Copyright of International Journal of Medicine & Science of Physical Activity & Sport / Revista Internacional de Medicina y Ciencias de la Actividad Física y del Deporte is the property of Revista Internacional de Medicina y Ciencias de la Actividad Fisica y del Deporte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Purpose: The aim of this study was to analyze the within-week differences in external training intensity in different microcycles considering different playing positions in women elite volleyball players. Methods: The training and match data were collected during the 2020–2021 season, which included 10 friendly matches, 41 league matches and 11 champions league matches. The players' position, training/match duration, training/match load, local positioning system (LPS) total distance, LPS jumps, accelerations, decelerations, high metabolic load distance (HMLD), acute and chronic (AC) mean and AC ratio calculated with the rolling average (RA) method and the exponentially weighted moving average (EWMA) method, monotony and strain values were analyzed. Results: All the variables except strain, Acc/Dec ratio and acute mean (RA) showed significant differences among distance to match days. Regarding the players' positions, the only difference was found in the AC ratio (EWMA); in all microcycles, the middle blocker player showed workload values when compared with the left hitter, setter and libero. Conclusion: Overall, the analysis revealed that the intensity of all performance indicators, except for strain, acc/dec and acute mean load (RA), showed significant differences among distance to match day with moderate to large effect sizes. When comparing players' positions, the middle blocker accumulated the lowest loads. There were no significant differences among other positions. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Sports Sciences Research / Spor Bilimleri Araştırmaları Dergisi is the property of Journal of Sport Sciences Researches / Spor Bilimleri Arastirmalari Dergisi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

With the development of volleyball technology, the frequent competition, the fierce competition, and the increase of sports load, the requirements for the athletes' own body, intelligence, combat, heart, and skills are getting higher and higher. Volleyball is one of the most popular sports in the world. It attracts people all over the world with its strong team appeal and its own unique charm. This study mainly discusses the characteristics of shoulder joint dysfunction in volleyball players and the effect of rehabilitation training under the background of artificial intelligence. By sorting out the development process of artificial intelligence technology, it can be analyzed that artificial intelligence technology already has a certain knowledge reserve, can make corresponding mechanized feedback, and can make correct judgments based on experience in more complex situations. This study compared volleyball athletes with handicap and barrier-free shoulder joints and observed the characteristics of shoulder pain, stability, and flexibility caused by subacromial impingement syndrome. It also looked at whether subacromial impingement syndrome athletes differ in volleyball spiking sequence and mobilization and recruitment of muscle power during swing spikes compared to athletes with normal shoulder function in the full kinetic chain. According to the volleyball intelligent competition platform, the implementation and application of ideas such as data collection, result feedback, adjustment of training plan, implementation of training plan, and real-time monitoring are regularly monitored. On the one hand, through timely assessment and detection of shoulder function of volleyball players, functional training is carried out for weaknesses to prevent injury; on the other hand, after a mild injury occurs, timely targeted training should be taken to find and correct wrong actions, and strengthen the weak part of muscle strength, so as to reduce the probability of repeated injury and improve sports performance and athletic ability. In the new system, after collecting and sorting, testers can directly upload to the web page in the form of Excel for automatic filling, grasp the test information of athletes in time, generate automatic warning, and save time. The monitoring content determined by this study mainly includes three index systems, including load, training preparation performance, and recovery. According to the self-provided evaluation system of relevant test equipment and the experience of expert coaches, the evaluation standards for each index are formulated. There was a statistically significant difference in the scores between the rehabilitation group and the pre-rehabilitation group during the study (P < 0.05). This study attempts to find the characteristics and rules of FMS scores of women's volleyball players of different levels, so as to provide more targeted physical training for volleyball players, promote the all-round development of physical fitness, and avoid the risk of sports injuries. This study provides more effective and comprehensive recommendations for the prevention and recovery of shoulder injuries in volleyball players. This study provides more effective and comprehensive recommendations for the prevention and recovery of shoulder injuries in volleyball players. The results of the study can provide reference for the scientific training and rehabilitation of volleyball players and make suggestions for the treatment and prevention of subacromial impingement syndrome. [ABSTRACT FROM AUTHOR]

The aim of this study is to determine the importance of plyometric training in maintaining the physical readiness of top female volleyball players, as the study sample consisted of 20 f active in the Al-Nour Volleyball Club, Laghouat. In order to identify the extent to which plyometric training contributes to maintaining the physical readiness of volleyball players, we conducted physical tests and applied a training program, as the results of the statistical analysis showed that plyometric training contributes greatly to maintaining the physical readiness of senior volleyball players. [ABSTRACT FROM AUTHOR]

Objective. To explore the effect of different training load stimulation on heart rate variability level of Chinese elite female volleyball players. Through two-year follow-up experiment, this paper uses OmegaWave Sport Technology system to track and test the heart rate variability level and central nervous system parameters of 25 elite Chinese women volleyball players who participated in the national adult volleyball training in 2019 and 2020. It is found that the HRV time-domain index of the players under the stimulation of three stages of training load during the winter training in 2020 is determined. Frequency-domain index has significant influence on response stability of central nervous system. In order to further explore the influence of HRV on response stability of central nervous system, a feature classification method based on distance evaluation is proposed for experimental data processing. Through the multimodal human-machine interaction (M-HMI), advanced machine learning is used to promote the cooperative interaction between human and intelligent body. After analysis, SDNN and LF n.u. have a significant impact on the average reaction time. It shows that some indexes tested by the OmegaWave system can reflect the real-time physical function state of athletes sensitively and play an active role in diagnosis of fatigue of athletes' central nervous system. HRV time-domain and frequency-domain indexes, as parameters to evaluate the body functional state of excellent female volleyball players in the preparation process of competition, can sensitively reflect the level of autonomic nerve regulation of athletes in three different load stages. [ABSTRACT FROM AUTHOR]

This study explored the relationship between sponsorship objectives and sport team reputation from the perspective of companies. Our data were based on a questionnaire sent to sponsors of Victorina Himeji, which is a professional women's volleyball club in Japan. One hundred ninety-four companies completed a survey about sponsorship objectives, sport team reputation, and sponsorship satisfaction. We conducted factor analysis, cluster analysis, t-test, and a two-way analysis of variance to examine the research questions. The results demonstrated that sponsorship objectives were composed of three factors (marketing objectives, corporate objectives, and team involvement). They were classified into a "highly valued" cluster and a "lowly valued" cluster. The t-test showed that the "highly valued" cluster was significantly higher than the "lowly valued" cluster in all variables except for spectator-orientation. Furthermore, comparing sport team reputation of each cluster with sponsorship satisfaction showed that the more satisfied the sponsorship of both clusters, the higher the sport team reputation. This study concludes that sponsorship objectives are important for both sponsors and sport teams. [ABSTRACT FROM AUTHOR]

Reaction speed represents a crucial ability to achieve a high-performance level in volleyball. A reliable computerized test for assessing reaction speed cannot simulate the dynamic environment of the volleyball game. Therefore, tests involving the activation of large muscle groups are needed. This study aimed to determine the reliability of young volleyball players' reaction speed ability using the Stopping the rolling ball test (SRB). Intraclass correlation coefficient (ICC), standard error of measurement (SEM) also expressed as a coefficient of variation (CV%), smallest worthwhile change (SWC), and minimal detectable change (MDC) were calculated. Paired t-test revealed no significant differences between test and re-test for first (t = -0.09, p = 0.92), mean of three (t = -0.37, p = 0.71), and best of three (t = -0.02, p = 0.98) trials. The ICC values showed poor relative reliability when the first trial was observed, while for the mean and best of three trials, reliability was consistently very high (excellent). The absolute reliability parameters (within-individual variation) showed large variations ranging from 5% to almost 10% and greater SEM (12.63 cm) for first trial when compared to other variables. The SEM was higher than SWC for all variables when the small differences (i.e., 0.2 multiplied by between-participants SD) were considered. This test showed a high level of absolute and relative reliability and usefulness, which means that the SRB test is an excellent indicator of reaction speed in young volleyball players. [ABSTRACT FROM AUTHOR]

Introduction. A volleyball game involves scoring a direct point during a sports match, so the players should be able to accurately send the ball to the selected area of the opponent's playing field. The aim of the study was to determine the relationship between the accuracy of the upper serve and the direction of its execution in female volleyball players aged 15 to 18. Materials and methods. 30 female volleyball players aged 15 to 18 participated in the study. A test was used to assess the level of accuracy of the upper serve in three directions of its execution. Results. The study group presented an average level of accuracy of the upper serve. A higher level of service accuracy was observed when serving near 9 meters from the pitch than around 3 meters of both side lines and when serving in a straight line to around 3 meters of the side of the pitch than diagonally. Conclusion. The direction of the upper serve determines the accuracy of its execution. It is reasonable to introduce specific exercises to improve the accuracy of the service in the training of young female volleyball players. [ABSTRACT FROM AUTHOR]

Copyright of Journal of Sport Sciences / Magallat ulum Al-Riyadat is the property of Republic of Iraq Ministry of Higher Education & Scientific Research (MOHESR) and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Introduction: In the game of volleyball, game efficiency is based not only on physical preparation and technical skills. A great deal of it depends on the players’ abilities to cooperate, communicate and adapt to the psychosocial aspects of team group dynamics. In this study we attempt to establish the players’ behavior in conflict situations, their basic personality characteristics and how these influence some game indicators. Methodology: 1) Background information; 2) Thomas-Kilmann Conflict Mode Instrument (1977); 3) Big Five Personality Test developed by Goldberg (1992). Results: The results of our research reveal that the scale with the highest result is Compromising, which is the trait described by both assertiveness and cooperativeness. We have significant differences between teams and age groups in terms of the scale Competing from the Thomas-Kilmann Conflict Mode Instrument and Conscientiousness and Agreeableness from the Big Five Personality Test. Conclusions: The younger players are more open and try to find more information about the sports environment and learn more about the game and their personal growth. The higher the qualification and the age, the more the players prefer competing and being assertive in their interpersonal relationships. The lower level players prefer clearer rules and instructions. The players from Maritza are more sport aggressive and with a higher winners’ attitude.

Grounded in Scanlan's sport commitment model (SCM), the purpose of this study was to explore the relationship between feelings of teammate acceptance and sport commitment in a sample of adolescent female volleyball players (N = 209). Despite theoretical justification for including social forms of influence such as social support and social acceptance as direct sources of sport commitment, empirical evidence has not been supportive of this association. Therefore, direct and indirect relationships between teammate acceptance and sport commitment within the SCM were tested. Findings supported the indirect relationship between teammate acceptance and sport commitment through sport enjoyment, personal investments, social constraints, and investment opportunities, accounting for 48% of the variance in sport commitment. It appears that teammate acceptance may be better situated as a distal source of sport commitment, but further research with more diverse samples is necessary. Sports psychologists who can collectively help athletes, coaches, and parents develop responsive interpersonal skills while reducing corporal punishment and aggression tactics can facilitate greater levels of social acceptance. [ABSTRACT FROM AUTHOR]

Knee pads have become increasingly popular among volleyball players. Given the fact high-intensity activities that are crucial to successfully playing this sport lead to an increased risk of a knee injury, the primary use of knee pads is to prevent potential injury. However, no research has been carried out to explain the effects of knee pads on the most important physical abilities in volleyball players, thus directly affecting performance. This study was undertaken to determine the effects of knee pads on the explosive power of the lower extremities, linear speed, and agility in young female volleyball players. In two separated sessions, 84 female volleyball players (age: 14.83 ± 0.72 years; height: 163.19 ± 8.38 cm; body mass: 53.64 ± 10.42 kg; VE: 5.30 ± 3.39 years) completed squat jumps (SJ), countermovement jumps (CMJ) with and without arm swing, linear sprints at 5-m and 10-m, modified t-test, and 5-10-5 shuttle test. Data analyses included descriptive statistics, paired sample T-tests and use of effect size (ES). There was no statistical difference between the two conditions for SJ (p = 0.156; ES = 0.18), CMJ (p = 0.817; ES = 0.03), CMJ with arm swing (p = 0.194; ES = 0.14), linear sprint at 5 m (p = 0.789; ES = 0.03) and 10 m (p = 0.907; ES = −0.01), modified t-test (p = 0.284; ES = 0.13), and 5-10-5 shuttle test (p = 0.144; ES = 0.19). Wearing knee pads has neither an inhibitory nor positive effects on explosive power of the lower extremities, linear speed, and agility in young female volleyball players. [ABSTRACT FROM AUTHOR]

Copyright of RICYDE. Revista Internacional de Ciencias del Deporte is the property of Revista Internacional de Ciencias del Deporte and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Burnout is a psychological syndrome of reaction to chronic stress that occurs in athletes who feel exhausted by a sport activity that was previously pleasurable and enjoyable. One technique to prevent and control the syndrome is through coping, which is the ability to deal with stressful situations. In contrast to traditional cross-sectional approaches, this study aimed to investigate burnout and coping strategy characteristics over time and to analyze the relationship between burnout dimensions and coping strategies. Fifty-four high-level volleyball athletes (twenty-eight men and twenty-six women, age M = 25.57, SD = 4.72, range 18-35) completed paper-and-pencil measures of burnout and coping four times throughout a sport season. The Friedman test presented a significant increase in the reduced sense of athletic accomplishment (X² = 20.58; p < 0.01) and sport devaluation (X² = 19.83; p < 0.01) perceptions during the season. However, no coping differences were observed through the longitudinal analysis. Burnout dimensions showed a moderate inverse correlation to confidence/motivation at all measurement points during the season. Overall, the findings suggest that burnout perceptions increase as the season progresses, highlighting the relevance for the periodization of burnout prevention and control. [ABSTRACT FROM AUTHOR]

In performance analysis, and most notably in match analysis, generalizing game patterns in a sport or competition may result in formulating generic models and neglecting relevant variability in benefit of average or central values. Here, we aimed to understand how different game models can coexist at the same competitive level using social network analysis with degree centrality to obtain systemic mappings for six volleyball matches, one for each of the six national teams playing in the 2014 World Grand Prix Finals, guaranteeing a homogeneous game level and balanced matches. Although the sample was not recent, this was not relevant for our purposes, since we aimed to merely expose a proof of concept. A total of 56 sets and 7,176 ball possessions were analysed through Gephi Software, considering game actions as nodes and the interaction between them as edges. Results supported the coexistence of different performance models at the highest levels of practice, with each of the six teams presenting a very distinct game model. For example, important differences in eigenvector centrality in attack zones (ranging from 0 to 34) and tempos (20 to 38) were found between the six teams, as well as in defensive lines (20 to 39) and block opposition (22 to 37). This further suggests that there may be multiple pathways towards expert performance within any given sport, inviting a re-conceptualization of monolithic talent identification, detection and selection models. Future studies could benefit from standardizing the metrics in function of the number of ball possessions. [ABSTRACT FROM AUTHOR]

Wegner predicts that under pressure self-avoiding instructions not to perform in a certain manner will break down precisely where it is least desired that is the hypothesis of the present study. Specifically, the aim was to test the hypothesis that when instructed not to serve into a certain zone, ironic error would be more prevalent under pressure. Our sample comprised 43 female participants between the age of 13 and 16 (Mage = 14.51, SD = 1.35) who were active volleyball players (Mtraining years = 5.40, SD = 2.38). We measured the participants' psychophysiological indications of anxiety via the heart rate, heart rate variability as well as the self-reported Mental Readiness Form-3. To measure performance, we counted the number of target and non-target serving zones under different anxiety conditions. Participants scored +5 points for serving into the target zone, scored -5 points for serving to the out or hitting the net and 1 point for serving into the court except the target zone. A 2 (anxiety) × 3 (serving zone) fully repeated measures ANOVA revealed a significant anxiety x serving zone interaction F (2, 84) = 36.52, p <.001. When instructed not to serve in a certain zone, players' overall performance did not change across anxiety conditions t (42) =.68, p =.50. Results did not provide support for the Wegner's theory as expected, but instead revealed evidence for the Woodman et al.'s (2015) differentiation of ironic performance error. The results demonstrate that the theory of ironic processes may account for practical instruction-based solution for reducing the susceptibility to ironic errors in the serving type of task in volleyball. [ABSTRACT FROM AUTHOR]

The purpose of this study is to explore spectators' worries and attitudes during the COVID-19 pandemic and to compare them by age group. The survey was conducted with spectators at a home match for Victorina Himeji, a professional women's volleyball club in Japan. Two hundred and seventeen spectators rated their worries about becoming infected with COVID-19 after being in the arena as well as their attitudes during the COVID-19 pandemic. The results reveal that spectators visiting the arena had significant levels of worry related to the attendees (e.g., "Gathering crowds of people in the arena" and "Possibility that someone in the arena is infected with COVID-19"). Furthermore, younger people were more worried about COVID-19 infection than other age groups, although no significant difference in attitudes appeared among the age groups. The findings of this study suggest the importance of practicing social distancing in the arena as well as measuring spectators' body temperature before they enter the arena. Furthermore, sport event organizers may need to implement the strategy of infection prevention based on spectators' age groups and other personal attributes. [ABSTRACT FROM AUTHOR]

Copyright of Facta Universitatis: Series Physical Education & Sport is the property of Facta Universitatis, Series Physical Education & Sport and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Volleyball is a sport that requires multiple explosive effort jumps. Specifically, scoring performance (i.e.,, spiking and blocking) is centred on the jumping component of the game, which is generally reflective of an individual's ability to sufficiently generate force and produce power. Thus, in an effort to enhance performance, it is of upmost importance to explore the relationships between strength development and its influence on jump ability. The purpose of this study was to determine the degree to which jump performance is influenced by an 8-week resistance-training protocol in national-level female volleyball players. The training protocol consisted of four components: 1.) muscular endurance, 2.) hypertrophy, 3.) maximal strength, 4.) maximal strength and explosive power. A secondary purpose was to provide both, the coach and athlete information on which areas of training should be emphasized. Thirteen (n = 13; age: 20.02 ± 3.95 years; height: 181.08 ± 8.17 cm; weight: 69.55 ± 10.07 kg) national league female volleyball players participated in this study and training program. Jump performance was assessed on three separate occasions via a squat jump (SJ), countermovement jump (CMJ), and countermovement jump with an arm swing (CMJa). Statistically significant (p ⩽ 0.05) improvements were observed from Pre-, Mid-, and Post-test, for the SJ and CMJ. Power and hypertrophy-based training approaches appeared to be the most beneficial for improving jump performance. Thus, if improving jump performance is an objective in athletes with a low training age, it is recommended that the S&C first focus on increasing muscle fibre size and hypertrophy-based training approaches before progressing to maximal strength and explosive power-focused training. [ABSTRACT FROM AUTHOR]

Purpose: The aim of the study was to determine the effects of morning exercise on cognitive performance followed by Partial Sleep Deprivation (PSD) in elite women volleyball players. Methods: 21 elite women volleyball players (age: 23.6. ± 2.9 years old; BMI: 19.1. ± 1.8) were investigated twice in a balanced, randomized design in two conditions of PSD and exercise in the morning following PSD (PSDE). The subjects were asked to fill the Pittsburgh Sleep Quality Index (PSQI) prior to the beginning of the study. The cognitive performance was measured using computerized neurocognitive tests of Vienna system test consisting of movement detection time (MDT); visual pursuit test (VPT); and cognitrone test (COG). Data was analyzed using Paired student's t-test. Results: The results suggested that reaction time (RT) (p = 0.004); median cognitive reaction (MCR) (p = 0.001); Median Motor Time (MMT) (p = 0.01) were impaired significantly in PSD condition compared to the PSDE. Furthermore, both processing speed (number of correct Responses and rejection) and selective attention (mean time for correct responses and rejections) (p = 0.001) were not changed significantly in PSDE in (p ≥ 0.05). However, PSD impaired the cognitive performance of elite women players. Conclusions: The findings indicate that the beneficial cognitive effects of low-intensity exercise may overcome the fatiguing effects derived from the partial sleep deprivation in the cognitive functioning of elite female volleyball players. [ABSTRACT FROM AUTHOR]

Copyright of Nigde University Journal of Physical Education & Sport Sciences / Nigde Üniversitesi Beden Egitimi ve Spor Bilimleri Dergisi is the property of Journal of Physical Education & Sports Science and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The study of the manner of execution (technique, and spatial aspects) can provide useful information to understand the game dynamics in beach volleyball and to obtain references values for the analysis of the game and the establishment of training goals. The aim of the study was to determine the influence of the manner of execution on serve and rally performance in elite women's beach volleyball players. A total of 3,009 serves from 44 women's players were analyzed. The variables studied were: serve technique, serve zone, serve destination, serve performance, and rally performance. An observational punctual, nomothetic, multidimensional, and intragroup design was used. A descriptive and inferential analysis of the data (Chi-Square Test) was done using SPSS v.21.0 software. The level of significance was set at p < .05. The manner of execution influences the serve performance. The jump float serve was the most used. The most effective destination was the zone between players, probability due to the players' displacement and interference between them. An absence of association between serve technique and rally performance was found. These findings showed possible connections between the way of executing the serve with the following actions done by the players and the players' strategies to control their physical load. These values may be useful to guide to players training, or to evaluate players in competition. [ABSTRACT FROM AUTHOR]

Knowledge of players' anthropometric profiles may contribute to a better understanding of the differences between their performance levels. For example, vertical jump height, which is a major indicator of a volleyball player's performance, is influenced by favorable anthropometric variables. This study's aim was to describe anthropometric profiles of elite female volleyball players competing in the 1st and 2nd divisions in Portugal and to link these profiles with performance skills such as jump height obtained during blocking and spiking actions. Fifty-nine volleyball players were analyzed according to their competitive level, forming three independent groups: GA (n = 20, A1 division, ranked first), GB (n = 21, A1 division, ranked last) and GC (n = 18, A2 division). Anthropometric data collected included body mass and height, arm span, seven skinfolds (triceps, biceps, subscapular, suprailiac, abdominal, thigh and calf), four body perimeters (relaxed brachial, contracted brachial, thigh and calf), and two body diameters (humeral and femoral). Performance data included the height obtained during block and spike actions. Significant differences were found between groups (GA/GB from A1 and GC from A2). Players in the GA had the highest body mass (68.05 ± 6.62 kg, p < 0.05), body height (176.35 ± 6.21 cm, p < 0.05), arm span (177.59 ± 6.09 cm, p < 0.05), lean mass (53.51 ± 4.94 kg, p < 0.05) and vertical jump heights (block: 0.36 ± 0.06 m and spike: 0.43 ± 0.05 m, p < 0.05). As expected, the fat mass percentage of GA players was the lowest (21.30 ± 2.61%). The results suggest that anthropometric profiles of volleyball players may vary according to the competitive level. The higher body mass, body height, arm span, and lean mass presented by GA players in comparison with GC players suggest these variables are important for top-level performance, since these athletes also exhibited higher jump heights. Variables such as height and arm span have a considerable genetic influence and could be important for early talent identification in volleyball. Other variables such as body mass, lean mass and vertical jump performance are more complex, since they also reflect the effects of environmental and training conditions. [ABSTRACT FROM AUTHOR]

Copyright of Spor Hekimligi Dergisi/Turkish Journal of Sports Medicine is the property of Turkish Journal of Sports Medicine / Spor Hekimleri Dernegi and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Sport injuries are unavoidable factors that influence the life of every elite athlete. They are most likely caused by increased frequency, intensity, and duration of training. Even the slightest injury could, from a functional point of view, influence athletic results. This research aims to analyse and provide data regarding injury typology of elite volleyball players of Serbia. Data were collected from 15 female volleyball players of the Serbian national volleyball team. The average age of the players was 25.53 years, with 14 years of volleyball experience. The results show that the most frequent injuries were injuries of the ankle (33%), followed by shoulder injuries (20%), and other injuries, and that the jumping phase had the highest occurrence of injury. [ABSTRACT FROM AUTHOR]

Purpose. Volleyball involves repetitive forceful actions predominantly of one arm, which could eventually lead to an injury or shoulder pathology. The aim of the study was to compare the range of motion and strength in the dominant and non-dominant shoulders of university level volleyball players, with the objective of examining any differences between sexes. Methods. A total of 19 university level volleyball players (9 men: 81.3 ± 8.0 kg, 21 ± 1 years; 10 women: 66.0 ± 8.2 kg, 19 ± 1 years) participated. The passive internal and external range of motion of the dominant and non-dominant spiking shoulders were measured with a goniometer. The shoulder strength tests were performed on an isokinetic dynamometer at the speed of 60°/s in the concentric mode of contraction. Shoulder internal and external rotator concentric strength, range of motion, and internal/external rotation strength ratios were tested between arm dominance and sex with the use of 2-way mixed design ANOVA. Results. Internal and external rotation strength was asymmetrical in both men and women, in favour of the dominant side (p < 0.05). Both men and women displayed asymmetrical external/internal ratios (p < 0.05), with greater ratios present in the non-dominant side. Conclusions. University level men and women volleyball players exhibit similar levels of significant asymmetry in the internal/external rotation strength between dominant and non-dominant spiking arms. Furthermore, subject-specific responses in strength asymmetries suggest further investigation at the individual level. Isokinetic shoulder screening could be used to reveal information about possible risk factors for shoulder injuries. [ABSTRACT FROM AUTHOR]

The purposes of this study were to analyze double-limb, dominant-limb, and nondominant-limb landings, each with a two-footed takeoff, in order to detect potential differences in muscle activity and ground reaction forces and to examine the possible influence of leg dominance on these parameters. Each of the three jump landing combinations was analyzed in 11 healthy female volleyball players (age 21 ± 3 yrs; height 171 ± 5 cm, mass 61.6 ± 5.5 kg, max. vertical jump height 28 ± 4 cm). Ground reaction forces under each limb and bilateral muscle activity of the vastus medialis, hamstrings, and lateral gastrocnemius muscles were synchronized and collected at 1,000 Hz. Normalized EMG amplitude and force platform data were averaged over five trials for each participant and analyzed using repeated-measures ANOVA. During the takeoff phase in jumps with one-footed landings, the non-landing limb loaded more than the landing limb (p = 0.003). During the 100 ms prior to initial contact, single-footed landings generated higher EMG values than two-footed landings (p = 0.004). One-footed landings resulted in higher peak vertical loading, lateral loading, and rate of lateral loading than two-footed landings (p < 0.05). Trends were observed indicating that muscle activation during one-footed landings is greater than for two-footed landings (p = 0.053 vs. p = 0.077). The greater forces and rate of loading produced during single-limb landings implies a higher predisposition to injury. It appears that strategic planning and training of jumps in volleyball and other jumping sports is critical. [ABSTRACT FROM AUTHOR]

Bone Mineral Density (BMD) and effects of exercise have been extensively studied for prevention and treatment. However, little is known as what happens to body composition, bone, and strength in a long period of time after quitting. The aim of this study was to compare BMD of ex-elite volleyball players (Ex-eVP) and sedentary women (SW) at the age of 40 and over regarding to their body composition, muscle strength. Thirty-three Ex-eVP and 33 sedentary women SW volunteers at the ages of 40 and over participated in the present study. BMD was measured by Dual Energy X-Ray Absorptiometry (DXA, Lunar Model DPX). Body composition compartments were obtained from total body scans. Takei Physical Fitness Test Dynamometers were used to measure subjects' leg, back and hand grip static strength. Findings revealed that all sites of BMD values of ex-eVP (except for distal forearm values) were higher than that of SW. Body composition were examined in part, body weight of ex-eVP (67.9 ± 8.3 kg) were not significantly higher than SW (65.2 ± 9.2 kg), and lean body mass were significantly higher (41.59 ± 4.96 P < 0.01) than SW (37.80 ± 3.46) in their older ages. Gained bone mass remained higher significantly (P < 0.01) at major sites for total body scan of leg and regional body scan of L 2-4 , in Ex-eVP (1.247 ± 0.170 and 1.217 ± 0.118 respectively) than SW (1.140 ± 0.132 and 1.144 ± 0.092 respectively) (Fig. 2). There was no significant difference in any of the left or right/dominant or non-dominant forearm and hip BMD values. Ex-eVP's static back, leg, left hand grip and right-hand grip strength (64.7 ± 11.7; 107.6 ± 27.2; 28.0 ± 3.4 P < 0.001 and 29.3 ± 4.3 P < 0.01 respectively) were significantly higher than that of SW (51.8 ± 12.1; 81.4 ± 25.0; 24.2 ± 3.6 P < 0.001 and 25.6 ± 4.3 P < 0.01 respectively) (Fig. 3). There was a significant but low relationship between Total Body BMD with FW for ex-eVP and total subjects (r = 0.369 and 0.311 P < 0.05 respectively). Playing volleyball at young ages helps to prevent osteoporosis and/or reverse bone loss, due to the possibilities of having less age-related bone loss and/or/both achieved higher peak bone mass than that of the sedentaries, notwithstanding age-related bone loss. [ABSTRACT FROM AUTHOR]

Copyright of Turkiye Klinikleri Journal of Health Sciences / Türkiye Klinikleri Sağlık Bilimleri Dergisi is the property of Turkiye Klinikleri and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The purpose of this research is to confirm the anthropometric structure and profile of Kosovo elite female volleyball players. The sample for this study included 116 trained women volleyball players from nine clubs of Kosovo Volleyball Super League (19.91±3.59 years old). The results of this study demonstrate that Kosovo elite female volleyball players' mean body height is 172.21±6.14 cm, whereas their body mass index, determined by the weight-to-height ratio averages (BMI) 20.47 (kg/m2). The results of this research study, confirmed the average body height and body weight, measure the girth and skinfold, also determined the body mass index of Kosovo elite female volleyball players. [ABSTRACT FROM AUTHOR]

Copyright of Facta Universitatis: Series Physical Education & Sport is the property of Facta Universitatis, Series Physical Education & Sport and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

The aim of this study was to determine the technical performance profile of service reception with regard to execution and efficacy level according to level of competition in women's volleyball. The sample of the study was composed of a total of 6,311 game phases from 187 sets in 48 matches played during season 2005-2006 by the following divisions: under-14, under-16, under-18, 2nd national senior division, 1st national senior division, and international senior division. The design of the study was a descriptive and inter- and intra-group correlational one. The variables studied included level of competition, technique used to serve, technique used to receive, zone where the reception was executed, and efficacy of reception. The results indicated that at higher levels of competition: a) there is higher efficacy in reception; b) number of errors decreases; and c) proportion of receptions that allow one or more attacking options for the receiving team increases. As level of competition increases, the effect of service on reception decreases, and receiving zones are more diverse. This study establishes the technical and tactical service-reception profiles in women's volleyball, compares them, and establishes the dependence between variables to understand how the action changes throughout the levels of competition. [ABSTRACT FROM AUTHOR]

The purpose of this study was to compare the effects of nonelastic adhesive tape, dynamic bracing, and no-tape/brace on static and dynamic balance during single-leg stance in women's college volleyball. Seventeen young uninjured players (18.94 ± 2.49 years; 1.71 ± 0.05 m; 65.45 ± 9.49 kg; 9.2 ± 4.1 years played; 4 ± 1 weekly training frequency) were submitted to three conditions presented in randomized order: dynamic bracing; nonelastic adhesive tape and no-tape/brace. In all conditions, the center of gravity displacement (total displacement, TD; anteroposterior displacement, APD and mediolateral displacement, MLD) of the dominant and non-dominant lower limb (DLL and NDLL) was assessed using the static and dynamic platform of the Biodex Balance System. The ANOVA (three-way) test with repeated measures was applied, considering a 5% significance level. The results showed no interaction between any of the independent factors in all displacements (p > 0.05). However, there was a significant main level effect for TD (p = 0.001, mean difference = 1.1°) and MLD (p = 0.013, mean difference = 0.30°), with greater displacement in the dynamic level compared to its static counterpart. There was also a significant main limb effect for APD (p = 0.003, mean difference = 0.73°) and MLD (p ≤ 0.001, mean difference = 0.60°), with a higher degree of instability in MND when compared to MD. In conclusion, the data indicated that the use of nonelastic tape and bracing was not superior to the no-tape/brace condition in controlling center of gravity displacement during single-leg stance. [ABSTRACT FROM AUTHOR]

Chocolate milk is an effective recovery beverage following endurance exercise. The purpose of this study was to determine its efficacy, compared to a traditional sports drink, for recovery from intermittent, tournament-style exercise through measures of performance, perception, and rehydration. On 2 days, 7 days apart, female collegiate volleyball players completed an exercise session, rested for 2 h, and repeated the exercise. Participants consumed one of two recovery beverages in a randomized, counterbalanced crossover design. The volume of chocolate milk (CM) was calculated to meet the post-exercise carbohydrate recommendation (1.0 g carbohydrate·kg body weight−1·h−1), and the sports drink (carbohydrate-electrolyte beverage; CE) was matched for volume. The beverages had similar effects on performance and perception variables; no significant differences were noted between treatments. Total urine volume collected over the 2-h recovery period was significantly lower for CM than CE (CM: M = 217, SD = 115 ml vs. CE: M = 412, SD = 245 ml; Z = 2.60, p =.009; r = −.58), and when total fluid consumed during recovery was compared to urine output as a percent retained, a significant difference was seen between CM and CE (CM: 79.7% vs. CE: 61.4%; t[9] = −3.34, p =.009; d = 1.06). Thus, it was concluded that chocolate milk is as effective as a traditional sports drink for females recovering from intermittent exercise with a short (2 h) recovery period, and that chocolate milk may be more beneficial than a sports drink for achieving rehydration post-exercise. [ABSTRACT FROM AUTHOR]