Please use this identifier to cite or link to this item: https://doi.org/10.1080/02640410701697388
Title: The influence of serial feeding of drinks at different temperatures on thermoregulatory responses during cycling
Authors: Lee J.K.W. 
Maughan R.J.
Shirreffs S.M.
Keywords: Body heat content
Exercise
Heat load and debt
Thermoregulation
Issue Date: 2008
Citation: Lee J.K.W., Maughan R.J., Shirreffs S.M. (2008). The influence of serial feeding of drinks at different temperatures on thermoregulatory responses during cycling. Journal of Sports Sciences 26 (6) : 583 - 590. ScholarBank@NUS Repository. https://doi.org/10.1080/02640410701697388
Abstract: In this study, we examined thermoregulatory responses to ingestion of separate aliquots of drinks at different temperatures during low-intensity exercise in conditions of moderate heat stress. Eight men cycled at 50% (s = 3) of their peak oxygen uptake (V̇O2peak) for 90 min (dry bulb temperature: 25.3°C, s = 0.5; relative humidity: 60%, s = 5). Four 400-ml aliquots of flavoured water at 10°C (cold), 37°C (warm) or 50°C (hot) were ingested after 30, 45, 60, and 75 min of exercise. Immediately after the 90 min of exercise, participants cycled at 95% V̇O2peak to exhaustion to assess exercise capacity. There were no differences between trials in rectal temperature at the end of the 90 min of exercise (cold: 38.11°C, s = 0.30; warm: 38.10°C, s = 0.33; hot: 38.21°C, s = 0.30; P = 0.765). Mean skin temperature between 30 and 90 min tended to be influenced by drink temperature (cold: 34.49°C, s = 0.64; warm: 34.53°C, s = 0.69; hot: 34.71°C, s = 0.48; P = 0.091). Mean heart rate from 30 to 90 min was higher in the hot trial (129 beats·min-1, s = 7; P < 0.05) than on the cold (124 beats·min-1, s = 9) and warm trials (126 beats·min-1, s= 8). Ratings of thermal sensation were higher on the hot trial than on the cold trial at 35 and 50 min (P < 0.05). Exercise capacity was similar between trials (P = 0.963). The heat load and debt induced by periodic drinking resulted in similar body temperatures during low-intensity exercise in conditions of moderate heat stress due to appropriate thermoregulatory reflexes.
Source Title: Journal of Sports Sciences
URI: https://scholarbank.nus.edu.sg/handle/10635/177621
ISSN: 02640414
DOI: 10.1080/02640410701697388
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