Rolling rhythms in front crawl swimming with six-beat kick.

Sanders, Ross and Psycharakis, Stelios (2009) Rolling rhythms in front crawl swimming with six-beat kick. Journal of Biomechanics, 42 (3). pp. 273-279. ISSN 0021-9290

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The purpose of this study was to establish the rhythm characteristics of skilled front crawl swimmers using a six-beat kick. These included the amplitudes of the first three Fourier harmonics (H1, H2, H3) and their percent contributions to power contained in the angular displacement signals of the shoulders, hips, knees, and ankles with respect to the longitudinal axis in line with the swimming direction. Three-dimensional video data of seven national/international level swimmers were collected during simulated 200m front crawl races in which swimmers maintained six-beat kicking patterns. Swimmers differed in all variables but had small variability across the four 50m laps. Modest changes occurred during the 200m, with the exception of shoulder roll, which remained constant and was represented almost entirely by a single sinusoid (H1). Changes across laps reached significance for swimming speed, stroke rate, hip roll, and H3 wave velocity between the knee and ankle. A H3 body wave of moderate and increasing velocity travelled caudally from hip to ankle compatible, in the light of existing knowledge of aquatic locomotion, with the goal of generating propulsion in an efficient manner.

Item Type: Article
Print ISSN: 0021-9290
Electronic ISSN: 1873-2380
Uncontrolled Keywords: Front crawl; Six-beat kick; Fourier harmonics; Body roll; Body waves; Rhythms; Swimming.
University Divisions/Research Centres: Faculty of Health, Life & Social Sciences > School of Life Sciences
Dewey Decimal Subjects: 700 Arts & recreation > 790 Sports, games & entertainment > 797 Aquatic & air sports
600 Technology > 610 Medicine & health > 612 Human physiology
Library of Congress Subjects: G Geography. Anthropology. Recreation > GV Recreation Leisure
R Medicine > RC Internal medicine > RC1200 Sports Medicine
Item ID: 2473
Depositing User: Dr. Stelios Psycharakis
Date Deposited: 26 Jan 2009 12:00
Last Modified: 14 Dec 2012 16:51

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