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- Title
Comparison of Classical Kinematics, Entropy, and Fractal Properties As Measures of Complexity of the Motor System in Swimming.
- Authors
Goh, Wan X.; Barbosa, Tiago M.; Morais, Jorge E.; Costa, Mário J.; Pendergast, David
- Abstract
The aim of this study was to compare the non-linear properties of the four competitive swim strokes. Sixty-eight swimmers performed a set of maximal 4 × 25m using the four competitive swim strokes. The hip’s speed-data as a function of time was collected with a speedo-meter. The speed fluctuation (dv), approximate entropy (ApEn) and the fractal dimension by Higuchi’s method (D) were computed. Swimming data exhibited non-linear properties that were different among the four strokes (14.048 ≤ dv ≤ 39.722; 0.682 ≤ ApEn ≤ 1.025; 1.823 ≤ D ≤ 1.919). The ApEn showed the lowest value for front-crawl, followed by breaststroke, butterfly, and backstroke (P < 0.001). Fractal dimension and dv had the lowest values for front-crawl and backstroke, followed by butterfly and breaststroke (P < 0.001). It can be concluded that swimming data exhibits non-linear properties, which are different among the four competitive swimming strokes.
- Subjects
SWIMMING; BACKSTROKE (Swimming); HUMAN mechanics; DIFFERENCES; KINEMATICS; ENTROPY
- Publication
Frontiers in Psychology, 2016, Vol 7, p1
- ISSN
1664-1078
- Publication type
Article
- DOI
10.3389/fpsyg.2016.01566