Do swimmers conform to criterion speed during pace-controlled swimming in a 25-m pool using a visual light pacer?
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.
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Aiheet: | uinti vapaauinti selkäuinti nopeus harjoittelu teknologia apuväline |
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Aihealueet: | kestävyys urheilu tekniset ja luonnontieteet |
Tagging: | Pacing |
DOI: | 10.1080/14763141.2019.1572781 |
Julkaisussa: | Sports Biomechanics |
Julkaistu: |
2021
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Vuosikerta: | 20 |
Numero: | 6 |
Sivuja: | 651-664 |
Julkaisutyypit: | artikkeli |
Kieli: | englanti (kieli) |
Taso: | kehittynyt |