Diminished dietary thermogenesis in exercise-trained human subjects.
The influence of exercise-training on dietary-induced thermogenesis (DIT) was investigated in humans. The resting metabolic rate was identical in trained and non-trained subjects, but the response to a meal containing 1,636 kcal (6.9 MJ) was markedly lower in trained subjects. Mean dorsal skin temperature, as measured by thermography, was not influenced by training. A significant correlation was observed between postprandial RQ and DIT, which indicates that the reduced energy expenditure noted in trained subjects is related to a greater lipid oxidation. This sparing effect of exercise-training on energy utilization in the form of carbohydrate, is interpreted as adaptive in the sense that energy is preserved for the purpose of producing work.
D000328:Adult; D001481:Basal Metabolism; D001833:Body Temperature Regulation; D002149:Energy Intake; D006801:Humans; D008297:Male; D010101:Oxygen Consumption; D010806:Physical Education and Training; D012420:Running; D012881:Skin Temperature; D013997:Time Factors