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The independent and combined effects of 16 weeks of vigorous exercise and energy restriction on body mass and composition in free-living overweight men--a randomized controlled trial.
Metabolism. 2003 Jan; 52(1):107-15.M

Abstract

This study assessed the effects of 16 weeks of energy restriction and vigorous exercise on body mass and body composition. Sixty sedentary men, mean body mass (mean +/- SD) 96.3 (13.9) kg and mean age 42.4 (5.0) years, were randomly assigned to either continue their normal energy intake or restrict energy intake by 4,186 to 6,279 kJ. d(-1). Each group was further randomized to a control light exercise program, or a vigorous exercise program for 3 half-hour sessions per week. Vigorous exercise improved maximum oxygen consumption (Vo(2max)) by approximately 24% (0.56 [95% confidence interval, 0.47 to 0.65) L. min(-1), P <.001) with no significant changes in body mass, body composition, or fat distribution. With energy restriction there was a significant reduction in body mass of 10.1 (8.0 to 12.2) kg, lean body mass (LBM) of 2.4 (1.5 to 3.3) kg, fat mass (FM) of 7.7 (5.9 to 9.6) kg, waist to hip ratio (WHR) of 0.03 (0.01 to 0.04), and the sum of 6 skinfolds of 26.9 (15.4 to 38.4) mm (P <.001). Combining vigorous exercise with energy restriction resulted in no further changes in measures of body composition. We conclude that in sedentary free-living overweight men, 16 weeks of energy restriction, but not vigorous intensity exercise, results in substantial reductions in body mass, LBM, and FM. Furthermore, vigorous intensity exercise when combined with energy restriction did not modify or enhance the changes in body fat distribution or body composition seen with energy restriction alone. The independent effects of exercise to induce changes in body mass and composition in the longer term in free-living overweight subjects on an energy-restricted diet deserve further study.

Authors+Show Affiliations

Department of Medicine, University of Western Australia, Western Australian Institute for Medical Research, Perth, Australia.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Clinical Trial
Journal Article
Randomized Controlled Trial
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

12524670

Citation

Cox, Kay L., et al. "The Independent and Combined Effects of 16 Weeks of Vigorous Exercise and Energy Restriction On Body Mass and Composition in Free-living Overweight Men--a Randomized Controlled Trial." Metabolism: Clinical and Experimental, vol. 52, no. 1, 2003, pp. 107-15.
Cox KL, Burke V, Morton AR, et al. The independent and combined effects of 16 weeks of vigorous exercise and energy restriction on body mass and composition in free-living overweight men--a randomized controlled trial. Metabolism. 2003;52(1):107-15.
Cox, K. L., Burke, V., Morton, A. R., Beilin, L. J., & Puddey, I. B. (2003). The independent and combined effects of 16 weeks of vigorous exercise and energy restriction on body mass and composition in free-living overweight men--a randomized controlled trial. Metabolism: Clinical and Experimental, 52(1), 107-15.
Cox KL, et al. The Independent and Combined Effects of 16 Weeks of Vigorous Exercise and Energy Restriction On Body Mass and Composition in Free-living Overweight Men--a Randomized Controlled Trial. Metabolism. 2003;52(1):107-15. PubMed PMID: 12524670.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - The independent and combined effects of 16 weeks of vigorous exercise and energy restriction on body mass and composition in free-living overweight men--a randomized controlled trial. AU - Cox,Kay L, AU - Burke,Valerie, AU - Morton,Alan R, AU - Beilin,Lawrie J, AU - Puddey,Ian B, PY - 2003/1/14/pubmed PY - 2003/2/1/medline PY - 2003/1/14/entrez SP - 107 EP - 15 JF - Metabolism: clinical and experimental JO - Metabolism VL - 52 IS - 1 N2 - This study assessed the effects of 16 weeks of energy restriction and vigorous exercise on body mass and body composition. Sixty sedentary men, mean body mass (mean +/- SD) 96.3 (13.9) kg and mean age 42.4 (5.0) years, were randomly assigned to either continue their normal energy intake or restrict energy intake by 4,186 to 6,279 kJ. d(-1). Each group was further randomized to a control light exercise program, or a vigorous exercise program for 3 half-hour sessions per week. Vigorous exercise improved maximum oxygen consumption (Vo(2max)) by approximately 24% (0.56 [95% confidence interval, 0.47 to 0.65) L. min(-1), P <.001) with no significant changes in body mass, body composition, or fat distribution. With energy restriction there was a significant reduction in body mass of 10.1 (8.0 to 12.2) kg, lean body mass (LBM) of 2.4 (1.5 to 3.3) kg, fat mass (FM) of 7.7 (5.9 to 9.6) kg, waist to hip ratio (WHR) of 0.03 (0.01 to 0.04), and the sum of 6 skinfolds of 26.9 (15.4 to 38.4) mm (P <.001). Combining vigorous exercise with energy restriction resulted in no further changes in measures of body composition. We conclude that in sedentary free-living overweight men, 16 weeks of energy restriction, but not vigorous intensity exercise, results in substantial reductions in body mass, LBM, and FM. Furthermore, vigorous intensity exercise when combined with energy restriction did not modify or enhance the changes in body fat distribution or body composition seen with energy restriction alone. The independent effects of exercise to induce changes in body mass and composition in the longer term in free-living overweight subjects on an energy-restricted diet deserve further study. SN - 0026-0495 UR - https://www.unboundmedicine.com/medline/citation/12524670/The_independent_and_combined_effects_of_16_weeks_of_vigorous_exercise_and_energy_restriction_on_body_mass_and_composition_in_free_living_overweight_men__a_randomized_controlled_trial_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0026049503500191 DB - PRIME DP - Unbound Medicine ER -