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Murray Steven R.; Michael, Timothy J.; McClellan, Powell D.
Journal of Strength and Conditioning Research: November 1995
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ABSTRACTThis study focused on the effects of 5- and 10-min fluid replacement intervals on heart rate, rating of perceived exertion (RPE), and posttrial oral temperature during a 1-hr bicycle exercise bout in a hot (32±1.5°C), humid (70±3%) environment. Three experimental conditions were used: no water replacement, 400-ml water prior to and 100 ml every 5 min, and 400-ml water prior to and 200 ml every 10 min. Differences were significant between no-fluid and 5-min fluid replacement conditions for heart rate after 25 min. Mean posttrial recovery heart rates differed significantly during all conditions. Mean RPE differed significantly between no-fluid and 5-min fluid replacement conditions after 30 min. Mean posttrial oral temperatures differed significantly between no-fluid and 5-min fluid replacement conditions. A 5-min fluid replacement interval of 100 ml may be optional for benefits on heart rate and RPE.

This study focused on the effects of 5- and 10-min fluid replacement intervals on heart rate, rating of perceived exertion (RPE), and posttrial oral temperature during a 1-hr bicycle exercise bout in a hot (32±1.5°C), humid (70±3%) environment. Three experimental conditions were used: no water replacement, 400-ml water prior to and 100 ml every 5 min, and 400-ml water prior to and 200 ml every 10 min. Differences were significant between no-fluid and 5-min fluid replacement conditions for heart rate after 25 min. Mean posttrial recovery heart rates differed significantly during all conditions. Mean RPE differed significantly between no-fluid and 5-min fluid replacement conditions after 30 min. Mean posttrial oral temperatures differed significantly between no-fluid and 5-min fluid replacement conditions. A 5-min fluid replacement interval of 100 ml may be optional for benefits on heart rate and RPE.

© 1995 National Strength and Conditioning Association