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Do swimmers conform to criterion speed during pace-controlled swimming in a 25-m pool using a visual light pacer?

Gonjo, T., McCabe, C., Coleman, S., Soares, S., Fernandes, R.J., Vilas-Boas, J.P. and Sanders, R., 2021. Do swimmers conform to criterion speed during pace-controlled swimming in a 25-m pool using a visual light pacer? Sports Biomechanics, 20 (6), 651 - 664.

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DOI: 10.1080/14763141.2019.1572781

Abstract

The purpose of this study was to investigate whether swimmers follow the instructed speed (vtarget) accurately with the aid of a commercial visual light pacer during front crawl and backstroke swimming in a 25 m pool. Ten male swimmers performed 50 m front crawl and backstroke at different speeds (controlled by a visual light pacer) in a 25 m pool. The mean speed during the 50 m swimming (vS) was quantified from the time measured by a stopwatch. The mean speed of the centre of mass during a stroke cycle in the middle of the pool (vCOM) was calculated from three-dimensional coordinates obtained from Direct Linear Transformation of two-dimensional digitised coordinates of 19 segment endpoints for each of six cameras. Swimmers achieved accurate vS in front crawl and backstroke (ICC = 0.972 and 0.978, respectively). However, vCOM for the single mid-pool sample had lower correlations with vtarget (ICC = 0.781 and 0.681, respectively). In backstroke, vCOM was slower by 4.1-5.1% than vtarget. However, this was not the case in front crawl (1.0-2.7%). With the use of a visual light pacer, swimmers can achieve accurate mean speed overall but are less able to achieve the target speed stroke by stroke.

Item Type:Article
ISSN:1476-3141
Uncontrolled Keywords:aquatic locomotion ; backstroke ; front crawl ; pacing ; Adolescent ; Athletic Performance ; Humans ; Lighting ; Male ; Swimming
Group:Faculty of Health & Social Sciences
ID Code:36258
Deposited By: Unnamed user with email symplectic@symplectic
Deposited On:16 Nov 2021 11:57
Last Modified:16 Nov 2021 11:57

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