Non-exercise daily energy expenditure and physical activity pattern in male endurance athletes |
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Authors: | Natalie Alméras Nancy Mimeault Olivier Serresse Marcel R Boulay Angelo Tremblay |
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Institution: | (1) Physical Activity Sciences Laboratory, PEPS, Laval University, GIK 7P4 Ste-Foy, Quebec, Canada |
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Abstract: | Summary The present study was performed to determine whether differences in non-exercise daily energy expenditure (M
d,ne) exist between trained and untrained individuals. The data from seven cross-country skiers were compared with those from eight sedentary men. Daily energy expenditure (M
d) was determined using the heart rate-oxygen consumption relationship; resting metabolic rate (M
r) was measured using indirect calorimetry. A physical activity questionnaire and ratios of M
d or M
d,ne to M
r were used as indices of physical activity. M
d and M
r were significantly higher in the trained subjects whereas M
d,ne was identical in the two groups. The ratio of M
d,ne to M
r and the data from the physical activity questionnaire showed that there was no significant difference in daily energy expenditure and physical activity pattern during the non-exercise time. These results suggest that the exercise-induced increase in daily energy requirements is not compensated by a more sedentary life during the other daily activities in these trained men.Supported by Sport Canada and NSERC of Canada |
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Keywords: | Energy expenditure Athletes Crosscountry skiers Energy metabolism Resting metabolic rate |
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