游泳极限运动后分形维数的变化

2016 1st International Conference on Technology and Innovation in Sports, Health and Wellbeing (TISHW) Pub Date : 2016-12-01 DOI:10.1109/TISHW.2016.7847776

T. Barbosa, Simin Chen, Pedro Forte, J. Morais

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引用次数: 0

摘要

线性变量往往不够敏感，不足以解释优秀运动员运动行为的变化。因此，应该选择非线性变量。目的是比较游泳前爬泳最大回合前后的分形维数。24名受试者进行了100米爬泳试验。在赛前(预测试)和赛后(后测试)，一根速度计电缆被系在游泳者的腰部，以测量髋部速度，并由此得出分形维数。分形维数在试验前和试验后呈显著下降，且效应大小中等。24名游泳者中有21人的分形维数下降。结果表明，经过最大试验后，疲劳状态下游泳行为的分形维数降低，从而使游泳行为的复杂度降低。

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The changes in fractal dimension after a maximal exertion in swimming

Quite often linear variables are not sensitive enough to explain the changes in the motor behavior of elite athletes. So, non-linear variables should be selected. The aim was to compare the fractal dimension before and after a maximal bout swimming front-crawl. Twenty-four subjects performed an all-out 100m trial swimming front-crawl. Immediately before (Pre-test) and after the trial (Post-test) a speed-meter cable was attached to the swimmer's waist to measure the hip speed from which fractal dimension was derived. The fractal dimension showed a significant decrease with a moderate effect size between pre- and post-tests. Twenty-one out of 24 swimmers decreased the fractal dimension. As a conclusion, there is a decrease in the fractal dimension and hence in the swimming behavior complexity being under fatigue after a maximal trial.

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2016 1st International Conference on Technology and Innovation in Sports, Health and Wellbeing (TISHW)

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