Rates of fluid ingestion alter pacing but not thermoregulatory responses during prolonged exercise in hot and humid conditions with appropriate convective cooling

被引：70

作者：

Dugas, J. P. ^{[1
]}

Oosthuizen, U. ^{[1
]}

Tucker, R. ^{[1
]}

Noakes, T. D. ^{[1
]}

机构：

[1] Univ Cape Town, Dept Human Biol, Res Unit Exercise Sci & Sports Med, MRC, ZA-7925 Cape Town, South Africa

来源：

EUROPEAN JOURNAL OF APPLIED PHYSIOLOGY | 2009年 / 105卷 / 01期

基金：

新加坡国家研究基金会;

关键词：

Heat; Rectal temperature; Temperature; Cycling; Performance; Exercise; Time trial; Dehydration; Anticipatory regulation; Fluid balance; ANTICIPATORY REDUCTION; BODY-TEMPERATURE; HEAT-STORAGE; DEHYDRATION; PERFORMANCE; HYPERTHERMIA; REPLACEMENT; INTENSITY; RUNNERS; VOLUME;

D O I：

10.1007/s00421-008-0876-6

中图分类号：

Q4 [生理学];

学科分类号：

071003 ;

摘要：

The aim of the study was to examine the effects of fluid replacement on thermoregulation and cycling performance in hot, humid conditions. Six male cyclists (PPO = 426 +/- A 39 W) performed six 80 km time trials. Subjects replaced 0% (0); 33% (33); 66% (66); or 100% (100) of the weight lost during an "ad libitum" trial (Ad Lib). In another condition (WET), subjects rinsed their mouths at 10 km intervals. There was no trial effect on any thermoregulatory variables or on performance. When WET, 0, 33 ("LO") were compared to Ad Lib; 66, 100 ("HI"), power output was higher in HI (209 +/- A 22 vs. 193 +/- A 22 W, p < 0.05). Restricting fluid below ad libitum rates impaired performance (LO group). Rates greater than ad libitum did not result in further improvements. Ad libitum fluid ingestion is optimal as it prevents athletes from ingesting too little or too much fluid.

引用

页码：69 / 80

页数：12

共 25 条

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[22] The influence of either no fluid or carbohydrate-electrolyte fluid ingestion and the environment (thermoneutral versus hot and humid) on running economy after prolonged, high-intensity exercise
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