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Do swimmers conform to criterion speed during pace-controlled swimming in a 25-m pool using a visual light pacer?
- Source :
-
Sports biomechanics [Sports Biomech] 2021 Sep; Vol. 20 (6), pp. 651-664. Date of Electronic Publication: 2019 Mar 20. - Publication Year :
- 2021
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Abstract
- The purpose of this study was to investigate whether swimmers follow the instructed speed ( v <subscript>target</subscript> ) 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 ( v <subscript>S</subscript> ) 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 ( v <subscript>COM</subscript> ) 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 v <subscript>S</subscript> in front crawl and backstroke (ICC = 0.972 and 0.978, respectively). However, v <subscript>COM</subscript> for the single mid-pool sample had lower correlations with v <subscript>target</subscript> (ICC = 0.781 and 0.681, respectively). In backstroke, v <subscript>COM</subscript> was slower by 4.1-5.1% than v <subscript>target</subscript> . 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.
- Subjects :
- Adolescent
Humans
Lighting
Male
Athletic Performance physiology
Swimming physiology
Subjects
Details
- Language :
- English
- ISSN :
- 1752-6116
- Volume :
- 20
- Issue :
- 6
- Database :
- MEDLINE
- Journal :
- Sports biomechanics
- Publication Type :
- Academic Journal
- Accession number :
- 30893017
- Full Text :
- https://doi.org/10.1080/14763141.2019.1572781