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The aim of this review is to summarize the current scientific knowledge about acceleration and deceleration demands during football training. A systematic search of three electronic databases (PubMed, SPORTDiscus, Web of Science) was performed to identify peer-reviewed relevant English-language articles, following PRISMA guidelines. All acceleration and deceleration data were analyzed and organized into four categories: i) training drills variables (i.e. manipulated drills variables such as number of players in small-sided games), ii) training exercises (i.e. different drills such small games or circuit training), iii) players' positions (i.e. demands for each playing position) and iv) training schedule (i.e. training sessions presented as microcycles, season sections or full season). Full-text articles of 42 studies were included in the final analysis. Players' level included: amateur, youth, semi-professional, professional and elite players. All playing positions were considered, including goalkeepers. Six different global position systems brands were used, with the majority measuring data at 10 Hz. Different thresholds and intensities were used in several papers. Lower acceleration and deceleration intensities occurred more often than higher intensities in all four categories. Different exercises elicit different demands and small-sided games presented higher acceleration and deceleration demands than circuit training and other running based drills. Furthermore, manipulating drills variables, as reducing or increasing number of players in small-sided games increase or decrease demands, respectively. Additionally, wide playing positions, such as fullbacks, are generally exposed to higher acceleration and deceleration demands. From a planning point of view, acceleration and deceleration demands decrease as match day approaches. [ABSTRACT FROM AUTHOR]

PURPOSE We aimed to examine the effects of limiting the number of ball touches on the physical and technical performances of junior football players during small-sided games (SSGs), which are widely used to improve football-specific physical and technical performances. METHODS Nineteen middle-school football players participated in the study and took a pretest for their physical and technical skills to be evaluated before the main experiment. During the SSG, to balance teams according to the players’ levels of physical fitness and skill, we selected players with the highest to lowest total scores and organized them in an ABBA order. Ten players who obtained the highest scores participated in the SSG once a week for 5 weeks under the limitation of a certain number of ball touches (one, two, three, four, or free touches). Players could only play with a set number of touches. Each SSG consisted of 4-min sets with 4-min breaks after each set on a pitch with a goal. RESULTS As the number of possible touches increased, the total distance and average speed of the players increased, and the distance ratio covered by running (over 13 km/h), but not walking or jogging, also increased. Regarding technical factors, as the number of touches a player could make increased, the number of passes decreased, whereas the rates of dribbles and defensive tackles increased. CONCLUSIONS As the number of ball touches increased during the SSG, the young players covered a greater distance with a higher speed, unlike professional players, and the frequency of skills mostly used, such as passing and dribbling during the SSG, showed different results.

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This study aimed to investigate the consistency of attacking tactical and technical behaviour, and physical characteristics, over multiple bouts, and variability across days, of a specific rugby union forwards small-sided game (SSG). Data was collected from 21 professional rugby union forwards during four training sessions. The SSG, consisting of five bouts of work (150-s) interspersed by passive recovery (75-s), aimed to elicit specific attacking tactical behaviour. Tactical behaviour (i.e., regularity of attacking shape [entropy]), and technical (e.g., passes) and physical (e.g., total distance) characteristics were quantified. Results showed that technical characteristics remained consistent, whereas the regularity of width of the attacking shape and two physical characteristics (i.e., total distance, training impulse) varied across bouts. However, these effects had limited practical significance. Technical characteristics were consistent across days, but minimal variability was observed for tactical behaviour and physical characteristics, as shown by their small random effects with 95% profile likelihood confidence intervals (PLCI) including zero (e.g., SD[95%PLCI] = 0.03[0.00, 0.06]). Consequently, consistency of stimulus over bouts and days is achievable for the majority of the variables investigated, thus supporting the use of SSG to elicit consistent attacking behaviour, but also technical and physical characteristics in rugby union forwards. [ABSTRACT FROM AUTHOR]

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Small-sided games is a commonly used training method to develop technical, tactical and physical qualities concurrently. However, a review of small-sided games in rugby football codes (e.g. rugby union, rugby league) is not available. This systematic review aims to investigate the acute responses and chronic adaptations of small-sided games within rugby football codes considering the constraints applied. Four electronical databases were systematically searched until August 2020. Acute and chronic studies investigating rugby football codes small-sided games, with healthy amateur and professional athletes were included. Twenty studies were eventually included: 4 acute and 1 chronic in rugby union, 13 acute and 2 chronic in rugby league. Acute studies investigated task and individual constraints. Chronic studies showed that small-sided games would be an effective training method to improve physical performance. Current research in rugby football codes is heavily biased towards investigating how manipulating constraints can affect the physical characteristics of small-sided games, with limited literature investigating the effect on technical skills, and no studies investigating tactical behaviour. Future research is needed to evidence the effects of constraint manipulation on technical and tactical behaviour of rugby football players in small-sided games, in addition to physical characteristics. [ABSTRACT FROM AUTHOR]

Introduction. Soccer is a complex team sport, in which moments of 1v1 during the game may decide the outcome. Despite this evidence, studies on this particularity are scarce, particularly involving young players. Aim of Study. The purpose of this study was to evaluate variations of internal and external loads in U-15 and U-12 soccer players associated to different smallsided game (SSG) conditions, in the 1v1 context. Material and Methods. Eight male soccer players participated in the study, integrating two groups, U-15 (n = 4) and U-12 (n = 4), monitored in different SSG models (2 minutes duration / 3 minutes interval rest, different pitch size SSG1 = 5 Ã--10 m; SSG2 = 10 Ã--15 m; SSG3 = 15 Ã--20 m). Soccer players carried GPS devices (WIMU PROTM, RealTrack System, Almería, Spain) operating at a sampling frequency of 10 Hz. The Mann-Whitney U test was used to compare groups in each SSG and the Kruskal-FWallis test was applied to compare the different SSGs. The significance level was adopted at p < 0.05. Results. Differences between the groups were observed mostly in HRmean and HR95-max. The distance covered (different between the groups, SSG1 197.7 ± ± 14.0 vs 162.3 ± 9.0 and SSG3 261.4 ± 10.6 vs 217.1 ± 27.4, respectively, for U-15 and U-12) and maximal velocity always increased with the increase of the pitch size. Explosive distance and accelerations were also different between the groups in SSG1 and SSG2, respectively. Differences throughout the SSGs were mainly recorded in terms of external load. Conclusions. This research suggests that the implemented 1v1 SSG model is relevant from the internal and external load perspective. Nevertheless, the internal and external loads in U-15 and U-12 soccer players present differences and specificities, which should be considered in exercise prescription and individualized evaluation of young soccer players. [ABSTRACT FROM AUTHOR]

In Australian Football (AF), small-sided games (SSGs) are used extensively to replicate particular technical, tactical or physiological responses. Whilst research on SSGs has been extensive in soccer, in AF it has been limited to agility demands and exploring the effect of field dimensions on technical skill (i.e., handballing) and physical responses of senior athletes. Therefore, this study investigated the effect of four different SSG player number conditions (5v5, 5v6, 6v6, 7v7) on the technical (e.g., kicking) and physical (i.e., odometer, m-min−1, max velocity and percentage of high intensity running) performance outcomes in 22 sub-elite youth AF players. Particular constraints were applied to the SSG to ensure the focus was on kicking (i.e., after each handball a kick must be performed). The results of this study demonstrate when more technical events are required under more pressured situations (i.e., physical and time) the 5v6 condition appears to be most appropriate. However, when the focus is on kicking to a contested possession (i.e., kicking to leading or covered players) balanced player numbers (e.g., 6v6) would appear optimal. Alternatively, when the SSG focus is on increasing physiological demands (i.e., m.min−1) lower player density conditions (i.e., 5v5) appear more suitable. [ABSTRACT FROM AUTHOR]

Introduction: This study investigated if the technical and physical match performance outcomes can be replicated in a 5v6 small-sided game (SSG). Methods: Sixteen youth Australian Football (AF) players (mean ± SD; age 16.5 ± 1.0 years, height 179.1 ± 8.0 cm, weight 69.5 ± 9.5 kg) were randomly recruited. Participants were assessed in the SSG during the week prior to the assessed match play. The technical variables assessed were kicking proficiency, number of kicks executed and the amount of time each player had with the ball before kick execution (i.e., under 2s, 2-4s, over 4s). The physical variables assessed were odometer, meters travelled per minute, maximum velocity and percentage of high intensity running. Results: The results suggest kicking proficiency, the number of kicks executed, meters travelled per minute and percentage of high intensity running were all higher in the SSG than during match play. Furthermore, the SSG had less technical variability in comparison to match play. During match play, players had less time affordance to execute a kick and achieved higher maximum running velocities than during the SSG. Conclusion: This research provides coaches with greater insights into the technical and physical performance demands of match play. [ABSTRACT FROM AUTHOR]

The purpose of this study was to investigate the structure of interrelationships among external (eT) and internal (iT) training intensity metrics and how these vary depending on game format in soccer. The variables were collected from 16 semi-professional players in seven types of small, medium, large-sided, and simulated games (SG). The eT variables were (per min): peak velocity (Vmax), total distance (DTmin), distance covered at velocities less than 60% (D < 60%min), between 60 and 80% (D > 60%min), and more than 80% (D > 80%min) of the maximal velocity, player load (PLmin), and distance covered accelerating at more than 2 m⋅s-2 (Daccmin) and decelerating at less than −2 m⋅s-2 (Ddecmin). The iT variables were: Edwards arbitrary units (EDWmin) and time spent at more than 80% of the maximal heart rate (T > 80% HRmin). All game formats were represented by three principal components (PC), explaining from 66.9 to 76.0% of the variance. The structure of the interrelationships among variables involved similar distributions in the PCs that are related to energetic production systems, such as the strength/neuromuscular dimension (PLmin and/or Daccmin and Ddecmin, complemented by DTmin and D < 60%min), the endurance/cardiovascular dimension (EDWmin), and the velocity/locomotion dimension (Vmax, D > 60%min, or D > 80%min). A particular combination of external and internal intensity measures is required to describe the training load of game formats.

The purpose of this study was to investigate the structure of interrelationships among external (eT) and internal (iT) training intensity metrics and how these vary depending on game format in soccer. The variables were collected from 16 semi-professional players in seven types of small, medium, large-sided, and simulated games (SG). The eT variables were (per min): peak velocity (V max), total distance (DTmin), distance covered at velocities less than 60% (D < 60%min), between 60 and 80% (D > 60%min), and more than 80% (D > 80%min) of the maximal velocity, player load (PLmin), and distance covered accelerating at more than 2 m⋅s-2 (Daccmin) and decelerating at less than −2 m⋅s-2 (Ddecmin). The iT variables were: Edwards arbitrary units (EDWmin) and time spent at more than 80% of the maximal heart rate (T > 80% HRmin). All game formats were represented by three principal components (PC), explaining from 66.9 to 76.0% of the variance. The structure of the interrelationships among variables involved similar distributions in the PCs that are related to energetic production systems, such as the strength/neuromuscular dimension (PLmin and/or Daccmin and Ddecmin, complemented by DTmin and D < 60%min), the endurance/cardiovascular dimension (EDWmin), and the velocity/locomotion dimension (V max, D > 60%min, or D > 80%min). A particular combination of external and internal intensity measures is required to describe the training load of game formats. [ABSTRACT FROM AUTHOR]

In Australian Football (AF), small sided games have been used extensively as an alternative training method for technical and physical adaptations. Considering their application to AF, it is surprising a valid and reliable small-sided game kicking assessment remains absent. Therefore, the aim of this study was to develop a valid and reliable 5v6 Australian football small-sided game kicking proficiency assessment. Youth male AF players (n = 145) from different stages within the AF talent pathway were recruited. Validity (i.e., logical and construct) and reliability (i.e., test re-test) were assessed. The largest kicking proficiency difference was between U13 and U16 players and between novice and sub-elite players. Between the ages of U16 and U18 kicking proficiency appears to stabilise. The Australian football small-sided kicking assessment was 97% successful in identifying players as either novice or sub-elite. Larger physical performance (i.e., odometer, m/min−1 and %HIR) outputs were noted between U14 and U18 players and novice and sub-elite players. Collectively, these findings suggest the Australian football small-sided kicking assessment is a valid and reliable AF kicking proficiency assessment tool and may provide worthwhile information to coaches regarding kicking performance along the AFL pathway, to profile player strengths whilst identifying specific areas of improvement. [ABSTRACT FROM AUTHOR]

Competing Interests: The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.

Most existing game analysis attempts do not consider situational context information sufficiently for the assessments of tactical behaviour. The purpose of this case study was to apply a new analysis approach, so far only used for 1-versus-1 analyses in soccer, to small-sided games and to identify and analyse therewith the efficiency of tactical patterns in 3-versus-2 game play. Therefore, 279 games, performed by an elite youth soccer team, were recorded by video and a position tracking system. The data was processed by the new approach, including unsupervised machine learning routines and artificial intelligence methods. Two crucial moments were used to analyse the occurring tactical patterns for the specific game: T0 (time instant of the shot) and T1 (time instant of the last action before the shot). For both moments typical tactical patterns, considering the spatio-temporal context of the situations, were found. By combining the patterns of both moments, hidden tactical strategies were identified and their efficiencies calculated. The most significant result is that offence attempts have the highest scoring probability when played via the wings near to the goal line and the final pass, before the shot, is given against the playing direction into the centre of the field. [ABSTRACT FROM AUTHOR]

El objetivo de este estudio fue examinar la carga interna que supone la utilización mediante un parámetro único que engloba los dos componentes básicos de la carga de entrenamiento, volumen, en forma de minutos, e intensidad que a través del porcentaje de la frecuencia cardíaca (FC) como exigencia fisiológica, para así determinar las exigencias físicas a las que están sometidos los jugadores de balonmano en situaciones reducidas de juego en función de la duración de la misma. Los sujetos participaron en tres formatos: un formato continuo de 8 minutos y dos formatos intermitentes fraccionados (2 periodos de 4 minutos y 4 periodos de 2 minutos) con la misma relación trabajo/descanso de recuperación pasiva entre los diferentes periodos (1:1/4). 12 jugadores (edad 22.82 ± 4.77 años) pertenecientes a un mismo equipo participaron en este estudio. Los sujetos fueron evaluados para valorar la frecuencia cardíaca en los tres formatos. Los resultados presentaron que existen diferencias significativas entre los formatos, siendo el formato continuo el que mayor valor de intensidad mostró. La evidencia sugiere que el formato continuo SSG propuesto induce mayores cargas internas (TRIMPS) en comparación con el formato SSG intermitente. Abstract The aim of this study was to examine the internal load of use by a single parameter which includes the two basic components of the training load, volume, in the form of minutes, and intensity by the percentage of heart rate (HR), to determine the physical stresses to which are subject the reduced handball players in small-sided games. Subjects participated in three formats: a continuous format 8 minutes and 2 formats fractionated (2 periods of 4 minutes and 4 periods of 2 minutes) with the same ratio of work / rest of passive recovery between different periods (1: 1 /4). 12 male players (age 22.82 ± 4.77 years) belonging to the same team in the league participated in this study. Subjects were evaluated to assess the heart rate in the three formats. The results showed significant differences between formats, with the biggest beneficiary to continuous format, which seems the most appropriate format to meet the demands of handball. Evidence suggests that continuous format SSG induce greater internal loads in players compared to intermittent SSG format and that should help coaches to establish a better distribution of play according to their objectives.

The aim of this study was to examine the internal load of use by a single parameter which includes the two basic components of the training load, volume, in the form of minutes, and intensity by the percentage of heart rate (HR), to determine the physical stresses to which are subject the reduced handball players in small-sided games. Subjects participated in three formats: a continuous format 8 minutes and 2 formats fractionated (2 periods of 4 minutes and 4 periods of 2 minutes) with the same ratio of work / rest of passive recovery between different periods (1: 1 /4). 12 male players (age 22.82 ± 4.77 years) belonging to the same team in the league participated in this study. Subjects were evaluated to assess the heart rate in the three formats. The results showed significant differences between formats, with the biggest beneficiary to continuous format, which seems the most appropriate format to meet the demands of handball. Evidence suggests that continuous format SSG induce greater internal loads in players compared to intermittent SSG format and that should help coaches to establish a better distribution of play according to their objectives.

Recreational soccer (RS) is becoming a popular alternative to the classical continuous exercise mode used for the improvement of cardiovascular and metabolic fitness in untrained people. The objective of this paper was to conduct a detailed systematic review of the literature, identifying the physiological responses to RS and the training effects of RS on aerobic fitness and health in untrained healthy individuals and clinical patients. PubMed, Google Scholar and ScienceDirect databases were searched using terms related to recreational soccer. Inclusion criteria were randomized controlled trials (RCT) that assessed acute physiological responses to RS or the training effects of RS on physical fitness and health in sedentary, untrained subjects of any age or health status. All studies were assessed for methodological quality using the PEDro scale. Thirty-five articles met the inclusion criteria; seven examined the acute response to RS, and 28 assessed training effects. Clear evidence was found that RS had positive effects on many health-related indices and variables, including VO2max (gains of 7-16%), blood pressure (reductions of 6-13 mmHg), body composition (decreased fat mass and improved indices of bone health), and metabolic and cardiac function. These positive effects were observed in both healthy individuals and clinical patients, irrespective of age or sex. Although this review provides clear evidence of the positive effects of RS on health, most studies had limitations of methodology (an average PEDro score < 6). Furthermore, many of the training studies were from a small number of research groups. Future studies should be extended to other countries and institutions to ensure generality of the results. Regular RS training leads to significant cardiovascular and muscular adaptations and gains of health both in sedentary individuals and clinical patients at all ages, suggesting that RS is a potentially highly motivational method to enhance population health.

The aim of this study was to investigate the effects of small-sided game training (SSGT) versus conventional aerobic interval training (CAIT) on soccer-specific endurance performance, lactate threshold levels (mmol·L-1), short-passing ability and defensive and offensive skills of a soccer match. Before and after a 6-week training intervention period, eighteen amateur soccer players (age 21.8±4.8 years) were tested. The tests included the anaerobic threshold (AnT) test, the Yo-Yo Intermittent Recovery Test Level 1 (Yo-Yo IR1), and the Loughborough Soccer Passing Test (LSPT). A manual notational match analysis system was utilized to evaluate the defensive and offensive skills of players during the matches. Both the SSGT and CAIT were performed two days a week and consisted of five sets of 6-minute periods of work at the individualized exercise intensity corresponding to the individual anaerobic threshold, with 3-minute recovery periods between sets. Mann-Whitney U and Wilcoxon signed rank tests were used to examine the between- and within-group differences, respectively. Statistical analyses revealed that the SSGT group players exhibited significantly better in terms of the LSPT scores (p<.01) and the number of defensive and offensive skills (p<.05). However, no other significant differences in the other variables were observed (p>.05). The results of the study suggested that SSGT improved short-passing ability, various soccer skills and physiological parameters, while CAIT only improved physiological parameters. SSGT improves soccer-specific endurance and technical ability of players at the same time, meaning it is a time efficient way of training. [ABSTRACT FROM AUTHOR]

The purpose of this study was to determine the effects of four and eight weeks small-sided handball game on aerobic capacity and repeated sprint ability of male handball players. Sixteen (16) male university handball players volunteered to act as subjects and were randomly assigned to small-sided handball game group (SSHG) and control group (CG). Small-sided handball game was administered three days in a week for eight weeks. Subjects were measured on aerobic capacity, total sprint time and fatigue index on three occasions first before administration of training as pre-test, after four weeks of training as mid test and after eight weeks of training as post-test. A two-way repeated measure ANOVA with last factor repeated revealed that aerobic capacity, total sprint time and fatigue index improved (p lt;0.05). Aerobic capacity showed an improvement of 4.75% after four weeks and 8.83% % after eight weeks of small-sided handball game training in male handball players. Similarly, total sprint time and fatigue index also decreased 4.19% and 34.9 % only after eight weeks of training but after four weeks no changes is observed. This study shows that small-sided handball game (4 vs. 4) is effective in improving aerobic capacity in four and eight weeks of training but total sprint time and fatigue index elicited changes only after eight weeks.

For years soccer training programs were not specific, and improve technical and analytical exercises were used physical and athletic. The objective of the study was to assess the effects of a training program with small-sided games, over the technique and the physical condition in young footballers. Thirty-six players (12,69±0,48 years old; 39,77±6,20 kg; 146,31±6,36 cm) developed fifteen sessions based on reduced football games (2 vs 2, 4 vs 4 and 8 vs 8). These activities lasted 40 minutes of the session and were performed 2 times a week. The footballer was evaluated twice (pre-test and post-test) through 8 field test: run with the ball, run with the ball and turn, dribbling, header, shot on goal, aerobic resistance, horizontal jump and agility. The statistical analysis by Student's t test reflected significant improvements in driving and dribbling (p≤0,01). Respect to physical variables there were significant improvements in agility and resistance (p≤0,05). The small-sided games are an effective stimulus to improve the execution of certain technical gestures and elements of the physical condition in young players. Use small-sided game can make your time and increase the specificity of the intervention.

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The purpose of this study was to compare the different modes to quantifying the training load in small-sided game (SSG), repeated sprint ability (RSA), and simulated match (SM). Ten female futsal players participated, which was conducted in three sessions. In all the sessions, heart rate, rating of perceived effort, and total duration of the session to calculate the training impulse (TRIMP), and internal load (IL) were recorded. Significant differences in HR max were observed between SM (196 beats·min-1) and SSG (186 beats·min-1), and also between SM and RSA (185 beats·min-1). However, no differences were found in HR max. Differences were found only in IL between SSG (103 a.u) and SM (222 a.u) and also between SSG and RSA (156 a.u). The RPEBorg presented difference only between RSA (13.5 a.u) and SSG (9.5 a.u) and SM (12 a.u). The results demonstrate that sessions with SM and SSG show similar psychological and physiological responses, but lower than observed in RSA training sessions. Thus, these procedures can be employed to improve physical abilities at different periods of futsal training. [ABSTRACT FROM AUTHOR]

Recreational soccer (RS) is becoming a popular alternative to the classical continuous exercise mode used for the improvement of cardiovascular and metabolic fitness in untrained people. The objective of this paper was to conduct a detailed systematic review of the literature, identifying the physiological responses to RS and the training effects of RS on aerobic fitness and health in untrained healthy individuals and clinical patients. PubMed, Google Scholar and ScienceDirect databases were searched using terms related to recreational soccer. Inclusion criteria were randomized controlled trials (RCT) that assessed acute physiological responses to RS or the training effects of RS on physical fitness and health in sedentary, untrained subjects of any age or health status. All studies were assessed for methodological quality using the PEDro scale. Thirty-five articles met the inclusion criteria; seven examined the acute response to RS, and 28 assessed training effects. Clear evidence was found that RS had positive effects on many health-related indices and variables, including VO2max (gains of 7-16%), blood pressure (reductions of 6-13 mmHg), body composition (decreased fat mass and improved indices of bone health), and metabolic and cardiac function. These positive effects were observed in both healthy individuals and clinical patients, irrespective of age or sex. Although this review provides clear evidence of the positive effects of RS on health, most studies had limitations of methodology (an average PEDro score < 6). Furthermore, many of the training studies were from a small number of research groups. Future studies should be extended to other countries and institutions to ensure generality of the results. Regular RS training leads to significant cardiovascular and muscular adaptations and gains of health both in sedentary individuals and clinical patients at all ages, suggesting that RS is a potentially highly motivational method to enhance population health. [ABSTRACT FROM AUTHOR]

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