Trial Registration: clinicaltrials.gov Identifier: NCT01186523
Version of Record online: 16 APR 2013
Copyright © 2012 The Obesity Society
Volume 21, Issue 3, pages E219–E228, March 2013
How to Cite
Donnelly, J. E., Honas, J. J., Smith, B. K., Mayo, M. S., Gibson, C. A., Sullivan, D. K., Lee, J., Herrmann, S. D., Lambourne, K. and Washburn, R. A. (2013), Aerobic exercise alone results in clinically significant weight loss for men and women: Midwest exercise trial 2. Obesity, 21: E219–E228. doi: 10.1002/oby.20145
Disclosure: The authors declared no conflict of interest.
Relevant conflicts of interest/financial disclosures: Nothing to report. Full financial disclosures and author notes may be found in the online version of this article
- Issue online: 16 APR 2013
- Version of Record online: 16 APR 2013
- Accepted manuscript online: 6 NOV 2012 08:15AM EST
- Manuscript Accepted: 1 OCT 2012
- Manuscript Received: 15 JUN 2012
- National Institutes of Health (NIH). Grant Number: R01-DK049181
Exercise is recommended by public health agencies for weight management; however, the role of exercise is generally considered secondary to energy restriction. Few studies exist that have verified completion of exercise, measured the energy expenditure of exercise, and prescribed exercise with equivalent energy expenditure across individuals and genders.
The objective of this study was to evaluate aerobic exercise, without energy restriction, on weight loss in sedentary overweight and obese men and women.
Design and Methods:
This investigation was a randomized, controlled, efficacy trial in 141 overweight and obese participants (body mass index, 31.0 ± 4.6 kg/m2; age 22.6 ± 3.9 years). Participants were randomized (2:2:1 ratio) to exercise at either 400 kcal/session or 600 kcal/session or to a nonexercise control. Exercise was supervised, 5 days/week, for 10 months. All participants were instructed to maintain usual ad libitum diets. Because of the efficacy design, completion of ≥90% of exercise sessions was an a priori definition of per protocol, and these participants were included in the analysis.
Weight loss from baseline to 10 months for the 400 and 600 kcal/session groups was 3.9 ± 4.9 kg (4.3%) and 5.2 ± 5.6 kg (5.7%), respectively, compared with weight gain for controls of 0.5 ± 3.5 kg (0.5%) (P < 0.05). Differences for weight loss from baseline to 10 months between the exercise groups and differences between men and women within groups were not statistically significant.
Supervised exercise, with equivalent energy expenditure, results in clinically significant weight loss with no significant difference between men and women.