Rodriguez-Fernandez, Alejandro, Sanchez-Sanchez, Javier, Ramirez-Campillo, Rodrigo, Nakamura, Fabio Y., Rodriguez-Marroyo, Jose A., and Gerardo Villa-Vicente, Jose (2019) Relationship between repeated sprint ability, aerobic capacity, intermittent endurance, and heart rate recovery in youth soccer players. Journal of Strength and Conditioning Research, 33 (12). pp. 3406-3413.

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Abstract

To investigate the relationship between repeated sprint ability (RSA) and several aerobic and anaerobic-related soccer-performance indicators, 45 youth soccer players (age 16.8 +/- 0.1 years) were classified into "high" (HAF) or "low" aerobic fitness (LAF) ((V)over dotO(2)max >= or <60 ml.kg(-1).min(-1), respectively) and completed an RSA test measuring best (RSA(best)), mean (RSA(mean)), total sprint time ( RSAtotal), and percent sprint decrement (Sdec). A laboratory (V)over dotO(2)max test (LabTest) together with anaerobic threshold (VT) and peak speed was measured (vLabTest). In addition, a 20-m multistage shuttle run test (MSRT) and a soccer-specific test (TIVRE-Soccer test-TST) were completed. Heart rate (HR) and HR recovery (HRR) were measured during all tests. High aerobic fitness presented greater (p <= 0.05) performance in LabTest, MSRT and TST, at maximal effort, at VT, as well as faster HRR. RSA was similar between HAF and LAF. Contrary to HAF, LAF showed negative correlation between vLabTest with RSA(mean) (r = -0.6, p = 0.000) and Sdec (r = 20.4, p = 0.044). Also, LAF showed negative correlation between TST end speed (vTST) and RSA(mean) (r = -0.5, p = 0.005) and Sdec (r = -0.5, p = 0.003). In LAF, RSA was strongly correlated with locomotor factors (e.g., vTST; VT) in both laboratory and field tests. Athletes with high total HRR (>12.5%) in TST presented better (p <= 0.05) Sdec in the RSA test. The multiple regression revealed that the LAF vLabTest explained 44.9, 40.0, and 13.5% of the variance in RSA(best), RSA(mean), and Sdec, respectively. Practitioners may consider these findings to optimize youth athletes' assessment and preparation processes.

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