Repeated sprint ability in young basketball players: one vs. two changes of direction (Part 1) |
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| Authors: | Johnny Padulo Guillaume Laffaye Monoem Haddad Anis Chaouachi Giuseppe Attene Gian Mario Migliaccio |
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| Institution: | 1. University “eCampus”, Novedrate, Italy;2. Tunisian Research Laboratory “Sports Performance Optimisation”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia;3. CONI – Italian Olympic Committee, Sardinia, Italy;4. Sport Sciences Department, UR CIAMS – Motor Control and Perception Group, Université Paris-Sud, Orsay, France;5. Sport Science Program, College of Arts and Sciences, Qatar University, Doha, Qatar;6. Tunisian Research Laboratory “Sports Performance Optimisation”, National Center of Medicine and Science in Sports (CNMSS), Tunis, Tunisia;7. AUT University, Sports Performance Research Institute New Zealand, Auckland, New Zealand;8. CONI – Italian Olympic Committee, Sardinia, Italy;9. Faculty of Medicine and Surgery, University of Cagliari, Cagliari, Italy;10. Sport Science Lab, London, UK |
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| Abstract: | The present study aimed to compare the changes of direction on repeated sprint ability (RSA) vs. intensive repeated sprint ability (IRSA) protocols in basketball. Eighteen young male basketball players performed on RSA 10 × 30-m (15 + 15-m, one change of direction)] and IRSA 10 × 30-m (10 + 10 + 10-m, two changes of direction)]. A correlation matrix between RSA, IRSA, “squat jump (SJ)–countermovement jump (CMJ)”, footstep analysis and total distance in Yo-Yo intermittent recovery level 1 was performed. The best time, worst time, total time and the number of footsteps were significantly smaller in the RSA test compared to IRSA test (P < 0.001), even though they were significantly correlated with each other (r > 0.80, P < 0.05). Blood lactate level and fatigue index did not show any difference between tests. The sensibility of the two tests assessed by the Bland–Altman analysis revealed a small bias (<1.5%) for almost all variables. Moreover, almost all time variables of the two tests were significantly correlated with the SJ (r > 0.478, P < 0.05), CMJ (r > 0.515, P < 0.05) and Yo-Yo (r > 0.489, P < 0.05) performances. The IRSA provided a reliable method for assessing specific sprint ability (with 10-m legs for IRSA ~2.3 s vs. 15 m for RSA ~3 s) with a closer link to basketball game’s actions (~2 s). Besides, IRSA could be an appropriate choice for assessing both RSA and changes of direction capacities in basketball players. |
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| Keywords: | acceleration braking phase ecological validity field testing performance analysis shuttle running |
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