title: Anthropometric, metabolic, psychosocial, and dietary characteristics of overweight/obese postmenopausal women with a history of weight cycling: a MONET (Montreal Ottawa New Emerging Team) study.
abstract: Characteristics of weight cyclers have not been fully assessed. The objective of this study was to determine the anthropometric, metabolic, psychosocial, and dietary profile of postmenopausal women according to weight-cycling history, defined as the frequency of going on a diet and losing >10 kg: never (0 times), low (1 time), moderate (2 to 3 times), or frequent (> or = 4 times). The sample of this cross-sectional study consisted of 121 overweight/obese postmenopausal women enrolled in a 6-month randomized weight-loss intervention between 2003 and 2006. Measures at baseline were used to evaluate body composition (fat mass by dual-energy x-ray absorptiometry and visceral fat by computed tomography); resting metabolic rate by indirect calorimetry; insulin sensitivity by hyperinsulinemic-euglycemic clamp; fasting plasma levels of glucose, lipids, leptin, ghrelin, and adiponectin; blood pressure; psychosocial profile (eg, body-esteem, self-esteem, stress, perceived risks, perceived benefits, self-efficacy, quality of life, dietary restraint, disinhibition, hunger); and dietary profile (3-day food record). Differences among groups of weight cyclers were determined using analyses of variance. Among the 121 women, 15.7%, 24.8%, 33.9%, and 25.6% were non-, low, moderate, and frequent cyclers, respectively. Frequent cyclers were characterized by higher body mass index (calculated as kg/m(2)) (current and at 25 years of age) and percent body fat mass, larger waist circumference, and lower resting metabolic rate/kg body weight than noncyclers (P<0.05); and moderate cyclers had lower plasma adiponectin values than noncyclers (P<0.05). For psychosocial measures, frequent cyclers were characterized by greater disinhibition and lower body esteem after controlling for body mass index (P<0.05). In conclusion, weight cycling was found to be associated with some unfavorable metabolic and psychosocial parameters.
authors.affiliation: Département de Nutrition, Université de Montréal, 2405Chemin de la Côte Ste-Catherine, Montréal, Québec H3T1A8, Canada. irene.strychar@umontreal.ca
authors.forename: Irene
authors.initials: I
authors.lastname: Strychar
authors.forename: Marie-Eve
authors.initials: ME
authors.lastname: Lavoie
authors.forename: Lyne
authors.initials: L
authors.lastname: Messier
authors.forename: Antony D
authors.initials: AD
authors.lastname: Karelis
authors.forename: Eric
authors.initials: E
authors.lastname: Doucet
authors.forename: Denis
authors.initials: D
authors.lastname: Prud'homme
authors.forename: Jonathan
authors.initials: J
authors.lastname: Fontaine
authors.forename: Rémi
authors.initials: R
authors.lastname: Rabasa-Lhoret