THE EFFECT OF A SILICONE SWIM CAP ON SWIMMING PERFORMANCE IN TROPICAL CONDITIONS IN PRE-ADOLESCENTS
Autor: | Olivier Hue; Olivier Galy |
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Sprache: | Englisch |
Veröffentlicht: |
2012 |
Quelle: | Directory of Open Access Journals: DOAJ Articles |
Online Zugang: |
http://www.jssm.org/vol11/n1/23/v11n1-23text.php https://doaj.org/toc/1303-2968 1303-2968 https://doaj.org/article/b803e93640ab4e01b015c9aee18a7f68 https://doaj.org/article/b803e93640ab4e01b015c9aee18a7f68 |
Erfassungsnummer: | ftdoajarticles:oai:doaj.org/article:b803e93640ab4e01b015c9aee18a7f68 |
Zusammenfassung
We tested whether the silicone swim caps (SC) worn by young swimmers in a tropical climate negatively influence aerobic performance. Nine trained pre- adolescents [11.8 (± 0.8) years] swam randomized 800-m trials (water: 32.9°C, outdoors: shade, 29.2 ± 0.2 °C, 74 ± 0.3 % rh) with a SC or a nude head (NH). Performance times and heart rate (HR) were monitored continuously. Rectal temperature (Trec) was measured before and after trials. The rating of perceived exertion (RPE) was assessed. Stroke frequency (SF), stroke length (SL) and stroke index (SI) were measured every 50-m. The SC trial was significantly longer than NH (799 ± 16 and 781 ± 16 seconds, respectively). Mean delta Trec was significantly greater in SC (0.2 ± 0.1°C vs. -0.1 ± 0.1°C in SC vs. NH), mean SI was significantly different in SC versus NH (1.83 ± 0.07 vs 1.73 ± 0.06); but RPE and mean HR, SF and SL showed no change. We conclude that a silicone swim cap worn in tropical environment significantly decreased 800-m crawl performance without affecting HR or RPE. Silicone swim caps worn by young swimmers in a tropical environment may also have negative effects on training capacity