AJCN Tufts Nutrition Symposium, Boston Sept 24-26
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American Journal of Clinical Nutrition, Vol 27, 254-259, Copyright © 1974 by The American Society for Clinical Nutrition, Inc.

The acute effects of food intake on energy expenditure during cycle ergometry

George A. Bray M.D.1, Brian J. Whipp Ph.D.1, and Sankar N. Koyal Ph.D.1

1 From the Department of Medicine, Harbor General Hospital, and the Departments of Medicine and Physiology, University of California School of Medicine, Los Angeles, California 90024

We have examined the effects of a single meal on oxygen consumption (VOO2) before and during exercise in six normal men. Ingestion of 1,000 or 3,000 kcal for breakfast increased VOO2 (thermic effect) by 10%, but the larger breakfast did not induce a greater effect than the smaller one. During exercise after food ingestion, there was an additional thermic effect which had the same magnitude as the effect of food itself. The thermic effects of exercise and food ingestion were not altered in four subjects who ingested 4,000 extra kcal daily for 30 days or in two subjects who ate a high protein and a low protein diet for 2-week periods.






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Copyright © 1974 by The American Society for Nutrition