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Article
Effect of resistance training on resting metabolic rate and its estimation by a dual-energy X-ray absorptiometry metabolic map
European Journal of Clinical Nutrition (2015)
  • Juan C. Aristizabal
  • Daniel Freidenreich, Rowan University
  • Brittanie M. Volk
  • Brian R. Kupchak
  • Catherine Saenz
  • Carl M. Maresh
  • William J. Kraemer
  • Jeff S. Volek
Abstract
Background/objectives: Fat-free mass (FFM) is the major predictor of resting metabolic rate (RMR). As protein supplementation during resistance training may augment gains in FFM, we investigated the effects of resistance training combined with protein supplementation on RMR and whether RMR responses could be estimated by a dual-energy X-ray absorptiometry (DXA) metabolic map.

Subjects/methods: Healthy adults completed a whole-body periodized resistance training program consisting of 96 workouts (~9 months). Participants were randomly assigned to supplement with whey protein (whey; n=18), soy protein (soy; n=21) or carbohydrate (carb; n=22). RMR was measured using indirect calorimetry (RMRIC) and estimated by DXA metabolic mapping (RMRMM) pretraining and posttraining.

Results: RMRIC increased from pretraining to posttraining in the whole cohort (1653±302 to 1726±291kcal/day, P=0.001) without differences between the groups. Delta RMRIC and RMRMM (73±158 vs 52±41kcal/day were not significantly different by t-test (P=0.303), although they were not significantly correlated (r=0.081; P=0.535). Stepwise regression identified 43% of the shared variance in delta RMRIC using total serum thyroxine, RMRIC and FFM at baseline (P=0.009).

Conclusions: These results indicate that 9 months of resistance training significantly increased RMR ~5% on average, but there was wide variability between individuals, which can be partially accounted for by changes in FFM and thyroid hormones.
Publication Date
July, 2015
DOI
10.1038/ejcn.2014.216
Citation Information
Juan C. Aristizabal, Daniel Freidenreich, Brittanie M. Volk, Brian R. Kupchak, et al.. "Effect of resistance training on resting metabolic rate and its estimation by a dual-energy X-ray absorptiometry metabolic map" European Journal of Clinical Nutrition Vol. 69 Iss. 7 (2015) p. 831 - 836 ISSN: 0954-3007
Available at: http://works.bepress.com/daniel-freidenreich/7/