The effects of physical exercise on metabolic rate and dietary-induced thermogenesis.
TLDR
It is concluded that regular physical exercise increases energy expenditure by factors additional to the energy requirement directly related to the physical work, which include an increased resting metabolic rale in exercise-trained rats, increased dietary thermogenesis induced by exercise and anticipatory increases in energy metabolism during the period preceding exercise.Abstract:
1. The energy metabolism of ad lib .-fed adult male Wistar rats receiving daily running exercise (0·9 km/d; 8° incline) on a motor-driven treadmill, over a period of 56 d, was compared with that of sedentary ad lib .-fed rats and sedentary restricted-fed rats of similar body-weight (approximately 420 g). 2. The metabolizable energy of the diet (Oxoid 41B) was 11·44 ± 0·05 kJ/g. This value was not affected by restricted feeding (70% ad lib .), exercise training or exercise itself. 3. Exercise-trained rats ate 5% more food than the sedentary ad lib .-fed rats but their equilibrium body-weight was 60 g lower than that of the latter group. 4. Resting metabolic rate, measured over 22 h in a respiration chamber was increased by 10% in exercise-trained animals. 5. Feeding increased energy expenditure (dietary-induced thermogenesis) and this effect was potentiated by performance of an exercise task. 6. Exercise-trained rats exhibited anticipatory rises in energy expenditure (approximately 40%) when placed on a stationary treadmill. 7. Treadmill work increased energy expenditure by a factor of 1·9–2·4. 8. The energy cost of the exercise, determined by respiration calorimetry was 66–80 J/g per km. These energy costs did not account for all the differences observed in food energy consumption of exercise-trained and sedentary rats of equal body-weight. 9. It is concluded that regular physical exercise increases energy expenditure by factors additional to the energy requirement directly related to the physical work. These factors include an increased resting metabolic rale in exercise-trained rats, increased dietary thermogenesis induced by exercise and anticipatory increases in energy metabolism during the period preceding exercise.read more
Citations
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Physical activity and resting metabolic rate
John R. Speakman,Colin Selman +1 more
TL;DR: It is suggested that exercise produces energetic benefits in other components of the daily energy budget, thus generating a net effect on energy balance much greater than the direct energy cost of the exercise alone.
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Hyperactivity in patients with anorexia nervosa and in semistarved rats: evidence for a pivotal role of hypoleptinemia.
Johannes Hebebrand,Cornelia Exner,Kathrin Hebebrand,C. Holtkamp,Regina C. Casper,Helmut Remschmidt,Beate Herpertz-Dahlmann,Martin Klingenspor +7 more
TL;DR: Hypoleptinemia, as a result of the food restriction, may represent the initial trigger for the increased activity levels in AN patients and in food-restricted rats.
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Meal size and thermic response to food in male subjects as a function of maximum aerobic capacity
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The Combination of Dietary Conjugated Linoleic Acid and Treadmill Exercise Lowers Gain in Body Fat Mass and Enhances Lean Body Mass in High Fat–Fed Male Balb/C Mice
Arunabh Bhattacharya,Md. Mizanur Rahman,Dongxu Sun,Richard Lawrence,Walter Mejia,Roger McCarter,Marianne O'Shea,Gabriel Fernandes +7 more
TL;DR: The combination of dietary CLA and exercise decreased fat mass and increased lean mass in mice fed a high-fat diet, and these effects may be related in part to decreased serum leptin and exercise-induced increases in oxygen consumption and energy expenditure.
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Insulin and the paraventricular hypothalamus: modulation of energy balance.
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TL;DR: The effects of insulin injections into the paraventricular hypothalamus (PVN) indicate that insulin in the PVN produces a primary modulation of the metabolic parameters central to maintaining energy balance, which increases thermogenesis, fat utilization and glycemic levels, and inhibits feeding.
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