Résumé :
|
[BDSP. Notice produite par INIST-CNRS 0rPz1R0x. Diffusion soumise à autorisation]. Context : A higher duration and intensity of exercise may improve long-term weight loss. Objective : To compare the effects of different durations and intensities of exercise on 12-month weight loss and cardiorespiratory fitness. Design, Setting, and Participants : Randomized trial conducted from January 2000 through December 2001 involving 201 sedentary women (mean [SD] age, 37.0 [5.7] years ; mean [SD] body mass index, 32.6 [4.2]) in a university-based weight control program. Intervention : Participants were randomly assigned to 1 of 4 exercise groups (vigorous intensity/high duration ; moderate intensity/high duration ; moderate intensity/moderate duration ; or vigorous intensity/moderate duration) based on estimated energy expenditure (1000 kcal/wk vs 2000 kcal/wk) and exercise intensity (moderate vs vigorous). All women were instructed to reduce intake of energy to between 1200 and 1500 kcal/d and dietary fat to between 20% and 30% of total energy intake. Main Outcome Measures : Body weight, cardiorespiratory fitness, and exercise participation. Results : After exclusions, 184 of 196 randomized participants completed 12 months of treatment (94%). In intention-to-treat analysis, mean (SD) weight loss following 12 months of treatment was statistically significant (p<. in all exercise groups intensity duration="8.9" kg moderate vigorous with no significant difference between groups. mean cardiorespiratory fitness levels also increased significantly post hoc analysis revealed that percentage weight loss at months was associated the level of physical activity performed and months. women reporting less than min had a inconsistent pattern or more conclusions : improved were achieved through combination diet during although differences found based on different durations intensities this group sedentary overweight women.>
|