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INTRODUCTION Due to the financial benefits of being able to promote talented players from the youth ranks into the senior first team, the crucial role of a sports scientist employed by a professional soccer club is to help identify and develop future players.
Publication of this journal is financially supported by the Ministry of Science, Technology and Development Republic of Serbia. Physical performance tests (PPTs) are used extensively throughout the sporting world as a means of screening athletes pre-season and pre-injury.
Excellent reliability for MRI grading and prognostic parameters in acute hamstring injuries. Treatment of the sacroiliac joint in patients with leg pain: a randomized-controlled trial.
The effect of knee braces on tibial rotation in anterior cruciate ligament-deficient knees during high-demand athletic activities. Differences in gait characteristics between total hip, knee, and ankle arthroplasty patients: a six-month postoperative comparison. Assessing physical and physiological characteristics in soccer players Why, what and how should we measure? Presentation on theme: "Assessing physical and physiological characteristics in soccer players Why, what and how should we measure? More opportunities with well-developed physical skills Perform physical work with higher quality (i.e.
Anaerobic demands in elite soccer Observations from game analyses: Mean top speed in males 31-32 km. Acceleration-peak velocity relationship Conclusion: Fast for 20 m, very likely fast for 40 m. However, due to the multifaceted requirements of soccer match-play, no single characteristic can predict long term success in soccer [17]. The following systematic review evaluated the measurement properties of PPTs related to the knee as each pertains to athletes. In order to keep up with the additional costs that we incurr with scaling our website, we need your help!
Furthermore, the authors set to endeavor the relationship between PPTs and the onset of injury in athletes. These included: one-leg hop for distance (single and triple hop), 6m timed hop, crossover hop for distance, triple jump, and single-leg vertical jump.
Subjects risk to be ruled out because of pacing strategies Test score affected by subject motivation Are the tests «overly» sensitive?

Similarly, chronological age has been reported to influence the performance characteristics of players from a French development center, with greater vertical jump heights and sprint speeds being attained by under 16s players over their under 14s counterparts [13]. The validity of the hop is questionable, whilst moderate evidence suggests that the hop test is responsive to changes during rehabilitation. Likewise, many studies have identified relationships between indices of lower body power production and sprint ability. However, very few studies involving young soccer players competing on behalf of teams in the UK are currently available. All players participated in one match per week (played on Saturday mornings) and players aged 16 or under trained after school on two evenings per week for approximately 2 hours, a session consisting of: a warm-up (15 min), individual technical training (30 min), team tactical training (30 min), small sided games (40 min), and a cool down period (5 min).
Within each team, all players trained together irrespective of the positional role except for the goalkeepers who received specialist position-specific technical training.
Players performed repeated 20 m shuttles interspersed with 180 degree turns as dictated by audio signals from a CD.
Subjects were instructed to complete as many stages as possible and the test stopped when the participant reached volitional exhaustion or failed to complete two successive stages within the allotted time. To minimize the likelihood of error, test administrators were positioned at each end of the 20 m course and assisted with identifying failed shuttles.
All data are presented as Mean A± Standard Deviation (SD) and the level of statistical significance was set at pa‰¤0.05. Our data suggest that each of the performance tests employed, namely: the CMJ, 15 m and 30 m sprinting, and the multistage fitness test can discriminate between players who compete at the under 14s and under 18s age groups. Interestingly, at least one measure of CMJ performance was also able to differentiate between players at the under 16s and the under 18s age groups whereas all other tests performed could not.
Previous authors had reported that technical skill was the most distinguishable characteristic between elite and non-elite under 14s players, while cardiorespiratory endurance was more important in under 16s players [25]. Consequently, it had been suggested that discriminating characteristics of fitness change with competitive age levels [25] and our data would appear to substantiate that assumption.
However, it is unclear as to whether the combination of tests performed in the current study was optimal to detect differences between the age groups sampled as previous authors had also identified differences between playing standards in agility, repeated-sprint ability, and cognitive components of soccer match-play [19].
Therefore, further investigation is warranted into the utility of specific performance tests at different ages in UK-based soccer players. Such information may aid in the development of a comprehensive database against which performance data from aspiring young players can be compared. The relative age effect (RAE) has become an area of interest in youth soccer [14], with authors generally reporting that players born in the first quarter of the selection year account for a disproportionate number of players selected in a squad of a given age. Explanations for the RAE in youth soccer tend to relate to physical characteristics as those born early in the year are generally taller and heavier than players born later in the year.

Data concerning the RAE in the soccer players examined in this study were not available as players categorised according to their birth month distribution within the age groups studied would have produced findings low in statistical power due to the small subject numbers involved.
Nevertheless, chronological age (which in this study and that of others was found to influence markers of maturity; Vanderford et al [26]) was found to differentiate between players in the youngest and oldest age groups, and to be significantly related to both anthropometric and performance characteristics. Consequently, although comment on the RAE in this group of youth soccer players is unavailable, the greater size, speed, and aerobic capacity of an individual may offer an advantage to male players who are older or more advanced in maturity status within their age group. However, if such an approach is adopted coaches should be aware that there is the risk of players who are equally talented but physically less mature at younger ages being dismissed on the basis of their physical characteristics and not on their adult potential [14]. The second aim of this study was to clarify the relationship between CMJ performance and sprinting ability. Consequently, these data appear to indicate that factors in addition to age have profound influences upon the relationship between CMJ and sprinting performance. In support of this, classification of players according to a€?higha€? or a€?lowa€? relative PPO in the CMJ differentiated between groups in relation to sprint times observed over 15 m and 30 m. Such information demonstrates the rationale for both CMJ and sprint testing in youth soccer players; however, the ability of the tests to differentiate between players of differing age should also be acknowledged when examining lower body power performances of youth soccer players. In support of previous research which characterizes players that compete outside the UK, our data suggest that the age of the player significantly influences these characteristics. Specifically, players in the under 18s age group were heavier, taller, faster, and elicited a greater VO2 max compared to their under 14s counterparts. However, players from the under 14s and under 16s teams were similar in terms of anthropometry and test performance in all indices measured. A secondary aim of this study was to provide further information concerning the relationships that exist between CMJ performance and sprinting (15 m and 30 m) in youth soccer players. In support of previous research we identified that significant correlations exist between both absolute and relative indices of CMJ performance and sprinting. Notably, when youth players were classified according to their relative PPO, players who elicited high values in the CMJ test outperformed those players scoring less high in the same test when sprinting.
Collectively, these findings may have implications for the organization and provision of training at professional clubs within the UK.

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Author: admin | 24.06.2016

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