Effects of repeated sprints with changes of direction on youth soccer player's performance: impact of initial fitness Level

Sanchez-Sanchez, Javier, Ramirez-Campillo, Rodrigo, Petisco, Cristina, Gonzalo-Skok, Oliver, Rodriguez-Fernandez, Alejandro, Minano, Javier, and Nakamura, Fabio Y. (2019) Effects of repeated sprints with changes of direction on youth soccer player's performance: impact of initial fitness Level. Journal of Strength and Conditioning Research, 33 (10). pp. 2753-2759.

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Abstract

The aim of this study was to assess the effect of an 8-week repeated sprint with change of direction (RS-COD) training program on RS, intermittent endurance, and change of direction performance in youth soccer players with different aerobic fitness levels. Athletes were randomly assigned into a soccer-only (n = 9; age, 14.9 +/- 0.4 years) and soccer plus RS-COD training programs for players with high (n = 10; age, 14.4 +/- 0.5 years) and low (n = 10; age, 14.4 +/- 0.5 years) aerobic fitness. Repeated sprint with change of direction was completed 2 days per week, involving 3 sets of ten 18-m sprints with 2 changes of direction of 90 degrees. The soccer-only group achieved greater improvements in intermittent endurance (effect size [ES] = 0.61) and sprint decrement during RS ability test (ES = 0.77) compared with the RS-COD groups (ES = 0.19-0.24; ES = -0.27 to 0.02; respectively). Repeated sprint with change of direction training improved RS (ES = 0.16-0.38) and change of direction (ES = 0.48) performance in high but not in low-fitness players (ES = 0.03-0.13; ES = 0.16; respectively). Moreover, improvements in RS and change of direction were (possibly) greater in high compared with low fitness and soccer-only trained players (possibly to very likely). In conclusion, although RS-COD training may positively affect RS and change of direction performance, its effects may vary according to the initial aerobic fitness of youth soccer players, with trivial effect on intermittent endurance in high-aerobic fitness players and possible beneficial effect on low-aerobic fitness players.

Item ID: 61508
Item Type: Article (Research - C1)
ISSN: 1533-4287
Keywords: football, maturation, strength and conditioning, testing and measurement
Copyright Information: Copyright © 2019 by the National Strength & Conditioning Association.
Funders: National Institutes of Health (NIH), Wellcome Trust (WT), Howard Hughes Medical Institute (HHMI)
Date Deposited: 22 Jan 2020 07:40
FoR Codes: 42 HEALTH SCIENCES > 4207 Sports science and exercise > 420702 Exercise physiology @ 100%
Downloads: Total: 1
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