Effects of short-term overfeeding on hunger, satiety, and energy intake in thin and reduced-obese individuals.
BACKGROUND
Certain individuals appear to be resistant to weight gain in an obesigenic environment, yet the mechanisms for this adaptation are unclear. These individuals may sense positive energy balance more appropriately than those individuals prone to weight gain.


METHODS
Thirteen thin (7 women, 6 men) and 9 reduced-obese (5 women, 4 men) individuals were studied. Measures of intake were obtained using visual analog scales before and after each meal during eucaloric feeding and during three days of 50% overfeeding. Ad libitum energy intake was measured post-overfeeding.


RESULTS
Overfeeding resulted in a significant reduction in pre-meal hunger in the thin (68+/-6 to 41+/-6 mm, p<0.0001) compared to the reduced-obese individuals (63+/-7 to 65+/-7 mm, p=0.67). There was a significantly greater increase (p=0.0016) in post-meal satiety scores during overfeeding in the thin (65+/-4 to 88+/-4 mm, p<0.0001) compared to the reduced-obese individuals (72+/-5 to 80+/-5 mm, p=0.04). Thin women had a 30% reduction in daily energy intake (1831+/-47 to 1273+/-79 kcal/day, p=0.005) after overfeeding while no difference was seen in the thin men or reduced-obese group.


CONCLUSIONS
Thin individuals appear to sense positive energy balance more appropriately with changes in measures of intake than reduced-obese individuals. These findings are especially true in thin women.
Cornier
Marc-Andre
MA
Division of Endocrinology, Metabolism, and Diabetes, Department of Medicine, University of Colorado Health Sciences Center, 4200 E 9th Ave, B-151, Denver, CO 80226, USA. mcornier@dhha.org
Grunwald
Gary K
GK
Johnson
Susan L
SL
Bessesen
Daniel H
DH
D000222:Adaptation, Physiological; D000328:Adult; D015992:Body Mass Index; D002149:Energy Intake / Q000502:physiology*; D005260:Female; D006801:Humans; D006815:Hunger / Q000502:physiology*; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000503:physiopathology*; D012527:Satiation / Q000502:physiology*; D012737:Sex Factors; D013851:Thinness; D015431:Weight Loss / Q000502:physiology