Metabolic, psychological, and health correlates of dietary restraint in healthy postmenopausal women.
BACKGROUND
Dietary restraint, a term used to describe the intentional control of food intake to prevent weight gain or promote weight loss, is commonly practiced by older adults, but little is known about its effects on physiology and metabolism.


METHODS
We therefore compared a wide range of parameters between groups of healthy non-obese postmenopausal women classified psychometrically as unrestrained eaters (body mass index [BMI] 23.8 +/- 0.6 [SEM] kg/m(2), n = 28) or restrained eaters (BMI 24.5 +/- 0.5, n = 39). Measurements were made of reported micronutrient intakes, cardiopulmonary function, hematology, body temperature, skin thickness, bone mass, and immune function; in addition, self-perceived health, mood, and some dimensions of eating behavior were assessed by questionnaire.


RESULTS
Macronutrient and micronutrient intakes were not significantly different between restrained and unrestrained eaters reporting energy intake to within 30% of predicted total energy expenditure. Restrained eaters had significantly lower hemoglobin (12.9 +/- 0.1 [SEM] vs 13.2 +/- 0.1 g/dl; p <.05), but values were within the normal range in both groups. In addition, restrained eaters scored significantly higher on the Eating Attitudes Test (p <.01) and drive-for-thinness (p <.001) and maturity fears (p <.05) subscores of the Eating Disorders Inventory, but values were again within the normal range. No other parameter differed significantly between groups.


CONCLUSIONS
In this normal-weight population, restrained eating was not associated with detrimental effects in a wide range of physiological, metabolic, and health characteristics. Further work is needed to determine the relevance of these results to the general population.
Jean Mayer USDA Human Nutrition Research Center on Aging, Tufts University, Boston, Massachusetts 02111, USA.
G P
GP
Bathalon
N P
NP
Hays
S N
SN
Meydani
B
B
Dawson-Hughes
E J
EJ
Schaefer
R
R
Lipman
M
M
Nelson
A S
AS
Greenberg
S B
SB
Roberts
D001294:Attitude to Health; D015519:Bone Density; D004038:Diet, Reducing; D002149:Energy Intake; D004734:Energy Metabolism; D005260:Female; D006304:Health Status; D006801:Humans; D008875:Middle Aged; D017698:Postmenopause / Q000378:metabolism / Q000502:physiology* / Q000523:psychology*; D012016:Reference Values