Effect of exercise duration and intensity on weight loss in overweight, sedentary women: A Randomized trial

摘要: ContextA higher duration and intensity of exercise may improve long-term weight loss.ObjectiveTo compare the effects different durations intensities exercise on 12-month weight loss cardiorespiratory fitness.Design, Setting, ParticipantsRandomized trial conducted from January 2000 through December 2001 involving 201 sedentary women (mean [SD] age, 37.0 [5.7] years; mean body mass index, 32.6 [4.2]) in a university-based control program.InterventionParticipants were randomly assigned to 1 4 groups (vigorous intensity/high duration; moderate intensity/high intensity/moderate duration; or vigorous intensity/moderate duration) based on estimated energy expenditure (1000 kcal/wk vs kcal/wk) (moderate vs vigorous). All instructed reduce intake energy between 1200 1500 kcal/d dietary fat between 20% 30% total energy intake.Main Outcome MeasuresBody weight, fitness, participation.ResultsAfter exclusions, 184 196 randomized participants completed 12 months of treatment (94%). In intention-to-treat analysis, (SD) loss following months was statistically significant (P <.001) all (vigorous duration = 8.9 [7.3] kg; = 8.2 [7.6] moderate intensity/moderate 6.3 [5.6] 7.0 [6.4] kg), with no difference groups. Mean (SD) cardiorespiratory fitness levels also increased significantly .04) 22.0% [19.9%]; moderate 14.9% [18.6%]; intensity/moderate duration 13.5% [16.9%]; 18.9% [16.9%]), with Post hoc analysis revealed that percentage weight at associated level physical activity performed 6 months. Women reporting less than 150 min/wk had mean (SD) 4.7% [6.0%]; inconsistent (other) pattern physical activity, 7.0% [6.9%]; more, 9.5% [7.9%]; 200 or more exercise, 13.6% [7.8%].ConclusionsSignificant improved were achieved combination diet during months, although no differences found intensities in this group sedentary, overweight women.