| The Effect of Time-of-Day on Cold Water Ingestion by High-Level Swimmers in Tropical Climate. | |
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MedLine Citation:
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PMID: 23295257 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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We tested the effect of cold water ingestion during high-intensity training in the morning versus the evening on both the core temperature and thermal perceptions of internationally ranked long-distance swimmers during a training period in a tropical climate. Nine internationally ranked long-distance swimmers (5 males and 4 females) performed 4 randomized training sessions (2 in the evening and 2 in the morning) with 2 randomized beverages with different temperatures for 3 consecutive days. After a standardized warm-up of 1000-m, the subjects performed a standardized training session that consisted of 10 x 100-m (start every 1'20") at a fixed velocity. The swimmers were then followed for the next 3000-m of the training schedule. Heart rate (HR) was continuously monitored during the 10 x 100-m, whereas core temperature (TC), thermal comfort (TC) and thermal sensation (TS) were measured before and after each 1000-m session. Before and after each 1000-m, the swimmers were asked to drink 190 mL of neutral (26.5 ±2.5°C) or cold (1.3 ±0.3°C) water packaged in standardized bottles. Results demonstrated that cold water ingestion induced a significant effect on TC with a pronounced decrease in the evening, resulting in significantly lower mean TC and lower mean delta TC in evening-cold (EC) than in evening-neutral (EN), concomitant with significantly lower TS in EC than in EN and a significant effect on exercise HR. Moreover, although TC increased significantly along time in MN, MC and EN, TC was stabilized during exercise in EC. To conclude, we demonstrate that a cold beverage had a significant effect on TC, TS and HR during training in high-level swimmers in a tropical climate, especially during evening training. |
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Authors:
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Olivier Hue; Roland Monjo; Marc Lazzaro; Michelle Baillot; Philippe Hellard; Laurent Marlin; A Jean-Etienne |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2013-1-4 |
Journal Detail:
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Title: International journal of sports physiology and performance Volume: - ISSN: 1555-0265 ISO Abbreviation: Int J Sports Physiol Perform Publication Date: 2013 Jan |
Date Detail:
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Created Date: 2013-1-8 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 101276430 Medline TA: Int J Sports Physiol Perform Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Laboratoire ACTES, UPRES-EA 3596, UFR-STAPS, Université des Antilles et de la Guyane, Campus de Fouillole, Guadeloupe, France. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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