FRACTAL DIMENSION AND HUMAN AQUATIC LOCOMOTION
Keywords: swimming, nonlinear parameters, Higuchi's method, speed fluctuation
AbstractThe aim was to investigate the fractal properties of human swimming and analyze its relationship with swimming kinematics. Eighty-two male swimmers from the local level up to World-ranked athletes undertook a set of 3x25m maximal trials at Front-Crawl. Fractal dimension (D) was calculated from the speed-time series collected with a speedo-meter. It was also calculated the speed fluctuation as an energy cost estimator. Human swimming showed fractal properties (1≤D≤2). The relationship between D and dv was very high analyzed in absolute values (R2=0.88; s=0.18; p<0.001) and Z-scores (R2=0.88; s=0.34; p<0.001). It can be concluded that human swimming shows fractal characteristics, though with lower values than gait. Energy cost of swimming increases with the complexity of the swimming patterns.
Coaching and Sports Activities
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