Dual-process action of exercise on appetite control : increase in orexigenic drive but improvement in meal-induced satiety
King, Neil A., Caudwell, Phillipa P. , Hopkins , Mark , Stubbs, James R. , Naslund, Erik , & Blundell, John E. (2009) Dual-process action of exercise on appetite control : increase in orexigenic drive but improvement in meal-induced satiety. American Journal of Clinical Nutrition, 90(4), pp. 921-927.
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Background: Exercise could contribute to weight loss by altering the sensitivity of the appetite regulatory system.
Objective: The aim of this study was to assess the effects of 12 wk of mandatory exercise on appetite control.
Design: Fifty-eight overweight and obese men and women [mean (±SD) body mass index (in kg/m2) = 31.8 ± 4.5, age = 39.6 ± 9.8 y, and maximal oxygen intake = 29.1 ± 5.7 mL · kg–1 · min–1] completed 12 wk of supervised exercise in the laboratory. The exercise sessions were designed to expend 2500 kcal/wk. Subjective appetite sensations and the satiating efficiency of a fixed breakfast were compared at baseline (week 0) and at week 12. An Electronic Appetite Rating System was used to measure subjective appetite sensations immediately before and after the fixed breakfast in the immediate postprandial period and across the whole day. The satiety quotient of the breakfast was determined by calculating the change in appetite scores relative to the breakfast's energy content.
Results: Despite large variability, there was a significant reduction in mean body weight (3.2 ± 3.6 kg), fat mass (3.2 ± 2.2 kg), and waist circumference (5.0 ± 3.2 cm) after 12 wk. The analysis showed that a reduction in body weight and body composition was accompanied by an increase in fasting hunger and in average hunger across the day (P < 0.0001). Paradoxically, the immediate and delayed satiety quotient of the breakfast also increased significantly (P < 0.05).
Conclusions: These data show that the effect of exercise on appetite regulation involves at least 2 processes: an increase in the overall (orexigenic) drive to eat and a concomitant increase in the satiating efficiency of a fixed meal.
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|Item Type:||Journal Article|
|Keywords:||Exercise, Appetite, Satiety, Dual Processes, Orexogenic|
|Subjects:||Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > PUBLIC HEALTH AND HEALTH SERVICES (111700) > Preventive Medicine (111716)|
Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > HUMAN MOVEMENT AND SPORTS SCIENCE (110600) > Human Movement and Sports Science not elsewhere classified (110699)
|Divisions:||Current > QUT Faculties and Divisions > Faculty of Health|
Current > Institutes > Institute of Health and Biomedical Innovation
Current > Schools > School of Exercise & Nutrition Sciences
|Copyright Owner:||Copyright 2009 American Society for Nutrition|
|Deposited On:||21 Jan 2010 14:37|
|Last Modified:||01 Mar 2012 00:03|
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