| Beneficial effects of ice ingestion as a precooling strategy on 40-km cycling time-trial performance. | |
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MedLine Citation:
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PMID: 20625187 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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PURPOSE: The effect of crushed ice ingestion as a precooling method on 40-km cycling time trial (CTT) performance was investigated. METHODS: Seven trained male subjects underwent a familiarization trial and two experimental CTT which were preceded by 30 min of either crushed ice ingestion (ICE) or tap water (CON) consumption amounting to 6.8 g x kg(-1) body mass. The CTT required athletes to complete 1200 kJ of work on a wind-braked cycle ergometer. During the CTT, gastrointestinal (Tgi) and skin (Tsk) temperatures, cycling time, power output, heart rate (HR), blood lactate (BLa), ratings of perceived exertion (RPE) and thermal sensation (RPTS) were measured at set intervals of work. RESULTS: Precooling lowered the Tgi after ICE significantly more than CON (36.74 +/- 0.67 degrees C vs 37.27 +/- 0.24 degrees C, P < .05). This difference remained evident until 200 kJ of work was completed on the bike (37.43 +/- 0.42 degrees C vs 37.64 +/- 0.21 degrees C). No significant differences existed between conditions at any time point for Tsk, RPE or HR (P > .05). The CTT completion time was 6.5% faster in ICE when compared with CON (ICE: 5011 +/- 810 s, CON: 5359 +/- 820 s, P < .05). CONCLUSIONS: Crushed ice ingestion was effective in lowering Tgi and improving subsequent 40-km cycling time trial performance. The mechanisms for this enhanced exercise performance remain to be clarified. |
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Authors:
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Mohammed Ihsan; Grant Landers; Matthew Brearley; Peter Peeling |
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Publication Detail:
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Type: Journal Article; Randomized Controlled Trial |
Journal Detail:
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Title: International journal of sports physiology and performance Volume: 5 ISSN: 1555-0265 ISO Abbreviation: Int J Sports Physiol Perform Publication Date: 2010 Jun |
Date Detail:
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Created Date: 2010-07-13 Completed Date: 2010-08-18 Revised Date: 2011-04-19 |
Medline Journal Info:
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Nlm Unique ID: 101276430 Medline TA: Int J Sports Physiol Perform Country: United States |
Other Details:
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Languages: eng Pagination: 140-51 Citation Subset: IM |
Affiliation:
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School of Sport Science, Exercise and Health, University of Western Australia, Crawley, WA, Australia. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Adult Athletic Performance* Bicycling* Body Temperature Cross-Over Studies Ergometry Heart Rate Humans Ice* Lactic Acid / blood Male |
| Chemical | |
Reg. No./Substance:
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0/Ice; 50-21-5/Lactic Acid |
| Comments/Corrections | |
Comment In:
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Int J Sports Physiol Perform. 2011 Mar;6(1):5-6; author reply 6-7 |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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