RT Journal Article T1 Evolution of determinant factors of repeated sprint ability A1 Pareja Blanco, Fernando A1 Suarez-Arrones, L. A1 Rodríguez Rosell, David A1 Lopez-Segovia, M. A1 Jimenez-Reyes, P. A1 Bachero-Mena, B. A1 González Badillo, Juan José K1 Anthropometrics K1 Repeated explosive efforts K1 Strength K1 Sprinting K1 Intermittent endurance K1 Soccer AB The aim of this study was to investigate the changes in the relationships between repeated sprint ability (RSA) and anthropometric measures as well as fitness qualities in soccer players. Twenty-one professional soccer players performed several anthropometric and physical tests including countermovement vertical jumps (CMJs), a straight-line 30 m sprint (T30), an RSA test (6 x 20 + 20 m with 20 s recovery), a progressive isoinertial loading test in a full squat, a Yo-Yo Intermittent Recovery Test Level-1 (YYIRT-1) and a 20 m shuttle run test (20mSRT). The mean (RSAmean), the fastest (RSAbest), each single sprint time, and the percentage in a sprint decrease (%Dec) in the RSA test were calculated. RSAbest correlated significantly with RSAmean (r = .82) and with all single sprints (p < 0.05), showing a downward trend as the number of sprints performed increased. No significant relationship was observed between the %Dec and RSA performance. CMJs and the T30 also showed a correlation with RSA performance, whereas lower limb strength did not show any relationship with RSA performance. RSAmean showed significant (p < 0.05) relationships with body mass (r = .44), adiposity (r = .59) and the YYIRT-1 (r = -.62), increasing as the number of repeated sprints increased. The 20mSRT showed minimal relationships with RSA performance. In conclusion, maximal sprint capacity seems to be relevant for the RSA performance, mainly in the first sprints. However, high intermittent endurance capacity and low adiposity might help enhance the RSA performance when increasing the number of repeated sprints. PB Journal of human kinetics YR 2016 FD 2016 LK https://hdl.handle.net/10433/22573 UL https://hdl.handle.net/10433/22573 LA en NO J Hum Kinet, 54, 115-126 NO Departamento de Deporte e informática. Universidad Pablo de Olavide. NO Centro de Investigación en Rendimiento Físico y Deportivo DS RIO RD May 22, 2026