期刊
JOURNAL OF APPLIED PHYSIOLOGY
卷 92, 期 3, 页码 1045-1052出版社
AMER PHYSIOLOGICAL SOC
DOI: 10.1152/japplphysiol.00706.2001
关键词
whole room calorimeter; gender differences; fat oxidation; body weight regulation
资金
- NATIONAL CENTER FOR RESEARCH RESOURCES [M01RR000051] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF DIABETES AND DIGESTIVE AND KIDNEY DISEASES [K01DK061348, P30DK048520] Funding Source: NIH RePORTER
- NCRR NIH HHS [M01 RR-00051] Funding Source: Medline
- NHLBI NIH HHS [HL-049331] Funding Source: Medline
- NIDDK NIH HHS [R01 DK-42529, P30 DK-48520, K01 DK061348] Funding Source: Medline
The aim of this study was to determine the effects of exercise at different intensities on 24-h energy expenditure (EE) and substrate oxidation. Sixteen adults (8 men and 8 women) were studied on three occasions [sedentary day (Con), a low-intensity exercise day (LI; 400 kcal at 40% of maximal oxygen consumption) and a high-intensity exercise day (HI; 400 kcal at 70% of maximal oxygen consumption)] by using whole room indirect calorimetry. Both 24-h EE and carbohydrate oxidation were significantly elevated on the exercise days (Con < LI = HI), but 24-h fat oxidation was not different across conditions. Muscle enzymatic profile was not consistently related to 24-h fat or carbohydrate oxidation. With further analysis, it was found that, compared with men, women sustained slightly higher rates of 24-h fat oxidation (mg.kg FFM-1.min(-1)) and had a muscle enzymatic profile favoring fat oxidation. It is concluded that exercise intensity has no effect on 24-h EE or nutrient oxidation. Additionally, it appears that women may sustain slightly greater 24-h fat oxidation rates during waking and active periods of the day.
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