Background & Objectives: Muscle mass is a major determinant of power development during maximal sprinting. The ability to recover and subsequently reproduce high-intensity efforts (termed repeated-sprint ability, RSA) is closely related to match-performance in soccer. The aim of this study is to assess any relationship between anthropometric parameters and RSA performance in a national soccer team in the Middle East. Method: Sixteen members of the senior male Qatar national soccer team performed six 35-m maximal running sprints on grass departing every 10-second. Sprint times, acceleration (Accbest and Accmean), velocity and peak (PP) and mean (MP) power were calculated. Power results were also adjusted to body mass. To assess RSA, total time and sprint decrement (Sdec) score were calculated. Anthropometric measures (e.g. breadths, girths, skinfolds) and derived factors (e.g. body composition, proportionality) were assessed according to the standard of the International Society for the Advancement of Kinanthropometry. Pearson's product-moment correlations were conducted. Results: Significant (p<0.05) relationships occurred between muscle-to-bone ratio and all RSA variables (r < -0.53 for sprint times and all r > 0.51 for Accmean, velocity and power scores) with the exception of Accbest and Sdec. Muscle index, cross-sectional area for mid-thigh and calf muscle groups were only correlated (p<0.05) with PP (r = 0.70, 0.73 and 0.60, respectively) and MP (r = 0.63, 0.73 and 0.62 respectively). The sum of 6 skinfolds and adipose index were positively correlated with Sdec (r = 0.68 and 0.55, respectively; p < 0.05). Conclusion: In the Qatar national soccer team players' RSA is associated with a high muscular profile and a low adiposity. Such observation would be of benefit with the purpose of providing training and nutritional recommendations to improve match-related performance in soccer.


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