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American Journal of Clinical Nutrition, Vol 59, 971-974, Copyright © 1994 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Intragastric vs oral feeding: effect on the thermogenic response to feeding in lean and obese subjects

DR Garrel and L de Jonge
Department of Nutrition, University of Montreal Medical School, Quebec, Canada.

The aim of this study was to observe the effects of oropharyngeal stimulation on thermogenic response to feeding (TRF) in obese and healthy individuals. Resting energy expenditure was measured in eight normal-weight (BMI, in kg/m2: 22.9 +/- 1.7) and nine obese subjects (BMI: 36.5 +/- 7.2), once after the ingestion of a standardized meal and once after the intragastric administration of the same, blenderized meal. In control subjects, TRF was lower after intragastric than after oral feeding: 5.6 +/- 1.4% vs 8.0 +/- 1.8% of the ingested energy for intragastric vs oral feeding, respectively (P < 0.01), but in obese subjects no difference occurred (6.5 +/- 3.0% vs 6.1 +/- 2.0%). In obese subjects the response over 6 h after the oral meal was lower than in/control subjects (P < 0.01). Intragastric TRF was not different between the two groups. This study confirms our previous observation that TRF has two components in humans, and suggests that oropharyngeal stimulation elicits a greater TRF in normal-weight than in obese individuals.


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 Am. J. Physiol. Endocrinol. Metab.Home page
P. Lopez, M. Ledoux, and D. R. Garrel
Increased thermogenic response to food and fat oxidation in female athletes: relationship with VO2 max
Am J Physiol Endocrinol Metab, September 1, 2000; 279(3): E601 - E607.
[Abstract] [Full Text] [PDF]


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Copyright © 1994 by The American Society for Nutrition