Volume Of Exercise For Prevention Of Weight Regain (MET POWeR)

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PURPOSE: There is limited evidence regarding the volume of exercise required to minimize weight regain. The purpose of this trial was to examine the impact of 3 levels of exercise on weight regain subsequent to weight loss in adult men and women. METHODS: Overweight/obese adults (n=175 (32 men, 143 women), age= 43 yrs., BMI~32 kg•m2) who lost ≥ 5% of their initial body weight in response to a 3-mo. weight loss intervention which included energy restriction and increased exercise (100 min•wk-1) completed a 12 mo. maintenance intervention. Participants were prescribed a weight maintenance diet (RMR x 1.4), attended biweekly behavioral sessions, and were randomized to one of 3 levels of exercise (150, 225, 300 min•wk-1), with a minimum of 3 sessions•wk-1 under supervision. Exercise min across 12 mos. were obtained from direct observation or heart rate monitors for supervised and unsupervised sessions, respectively. RESULTS (Table 1): There were no significant differences in the volume of exercise competed during weight loss (0-3 mos.) by randomized group (p = .32) or gender (p =.85). Average mins of completed exercise were significantly greater in those randomized to 300 min•wk-1 (170 min•wk-1) compared with both the 150 min•wk-1 (147 min•wk-1) or 225 min•wk-1 (120 min•wk-1, p <.05) groups. Weight regain across all 3 groups was minimal (<3%); however, there were no significant differences in the magnitude of weight regain by randomized group (p=.21) or gender (p=.37). CONCLUSION: These findings suggest that exercise, irrespective of magnitude, is associated with weight loss maintenance.Table: No title available.Funding: NHLBI R01-HL11842 (Donnelly); NIDDK F32-DK103493 (Szabo-Reed)

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