Drink temperature influences fluid intake and endurance capacity in men during exercise in a hot, dry environment
Drink temperature influences fluid intake and endurance capacity in men during exercise in a hot, dry environment
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DOI：
10.1113/expphysiol.2006.034223
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发表时间：
2006-09-01
影响因子：
2.7
通讯作者：
Jones, David A.
中科院分区：
文献类型：
--
作者：
Mundel, Toby;King, Jenny;Jones, David A.
不同的饮料温度对运动和运动耐力的影响还没有得到广泛的研究。因此，本研究的目的是研究饮料温度对热量循环期间液体摄入量和耐力的影响。8名健康、未适应环境的男性（26 +/- 7岁;最大摄氧量，54 +/- 5 ml kg（-1）min（-1）;平均值+/- S.D.）在34摄氏度和65%的峰值有氧能力下循环至精疲力竭，在19摄氏度（CON）或4摄氏度（COLD）下饮用饮料。8名受试者中有6名在COLD期间骑车时间更长，在62 +/- 4分钟时出现疲劳，而CON为55 +/- 4分钟（P < 0.05;平均值+/- S.E.M.）。受试者在COLD期间消耗的液体显著多于CON（1.3 +/- 0.3 l h（-1）对比1.0 +/- 0.2 l h（-1）; P < 0.05）。在COLD试验期间，心率倾向于降低5次/分（-1），在COLD试验期间，运动期后半期的直肠温度降低0.25 ℃;然而，这些趋势并不显著（分别为P = 0.08和P = 0.07）。两项试验的通气量、催乳素、葡萄糖和乳酸盐浓度或自觉劳累度无差异。得出的结论是，在高温下运动时喝4摄氏度的饮料可以增加液体消耗，并通过充当散热器来提高耐力，减弱体温的上升，从而减少热应激的影响。
The effect of different drink temperatures on the perception of exertion and exercise endurance has not been extensively investigated. Consequently, the purpose of the present study was to examine the effect of drink temperature on fluid intake and endurance during cycling in the heat. Eight healthy, non-acclimated males (26 +/- 7 years; maximum oxygen uptake, 54 +/- 5 ml kg(-1) min(-1); mean +/- S.D.) cycled to exhaustion at 34 degrees C and at 65% of their peak aerobic power, consuming a drink at either 19 degrees C (CON) or 4 degrees C (COLD). Six of the eight subjects cycled for longer during COLD, with exhaustion occurring at 62 +/- 4 min, compared to 55 +/- 4 min for CON (P < 0.05; mean +/- S.E.M.). Subjects consumed significantly more fluid during COLD compared to CON (1.3 +/- 0.3 l h(-1) compared to 1.0 +/- 0.2 l h(-1); P < 0.05). Heart rate tended to be lower by similar to 5 beats min(-1) during COLD, and rectal temperature during the second half of the exercise period was similar to 0.25 degrees C lower during the COLD trial; however, these trends were not significant (P = 0.08 and P = 0.07, respectively). No differences were observed between trials for ventilation, concentrations of prolactin, glucose and lactate or perceived exertion. It is concluded that a drink at 4 degrees C during exercise in the heat enhances fluid consumption and improves endurance by acting as a heat sink, attenuating the rise in body temperature and therefore reducing the effects of heat stress.