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. 2018 Apr;58:321-329.
doi: 10.1016/j.humov.2017.12.010. Epub 2017 Dec 15.

The Changes in Classical and Nonlinear Parameters After a Maximal Bout to Elicit Fatigue in Competitive Swimming

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The Changes in Classical and Nonlinear Parameters After a Maximal Bout to Elicit Fatigue in Competitive Swimming

Tiago M Barbosa et al. Hum Mov Sci. .

Abstract

The aim was to assess the effect of fatigue on linear and nonlinear parameters in swimming. Twenty-four fitness-oriented swimmers performed a maximal bout of 100 m at front-crawl to elicit fatigue. Before (pre-) and immediately after (post-test) the bout, participants swam an all-out 25 m to derive the speed fluctuation (dv), approximate entropy (ApEn) and fractal dimension (FD) from the speed-time series collected by a speedo-meter. Swim speed was 10.85% slower in the post-test than in the pre-test (p < .001, η2 = 0.72). There was an effect of the fatigue on the dv with a moderate effect size. The dv increased shifting the 95CI band from 0.116-0.134 to 0.140-0.161. The ApEn showed non-significant variations between the pre- and post-test having the 95CI of pre- and post-test overlapped (pre: 0.659-0.700; post: 0.641-0.682). The FD showed as well a significant variation (the 95CI moved from 1.954-1.965 to 1.933-1.951). It can be concluded that in swimming there are changes in classical and nonlinear parameters under fatigue.

Keywords: Biomechanics; Dynamical systems; Fatigue; Performance; Sports.

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