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https://hdl.handle.net/2440/8800
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Type: | Journal article |
Title: | Effect of 3 weeks of detraining on the resting metabolic rate and body composition of trained males |
Author: | LaForgia, J. Withers, R. Williams, A. Murch, B. Chatterton, B. Schultz, C. Leaney, F. |
Citation: | European Journal of Clinical Nutrition, 1999; 53(2):126-133 |
Publisher: | STOCKTON PRESS |
Issue Date: | 1999 |
ISSN: | 0954-3007 1476-5640 |
Abstract: | <h4>Objective</h4>To examine the hypothesis that detraining decreases the resting metabolic rate (RMR) of long-term exercisers.<h4>Design</h4>Eight pairs of subjects were matched for age, mass and training volume. They were then randomly allocated to either a control group (continue normal training) or detraining group (stop normal training but continue activities of daily living).<h4>Setting</h4>Exercise Physiology Laboratory, The Flinders University of South Australia.<h4>Subjects</h4>Sixteen male subjects (age 23.1 +/- 4.7 y (s.d.); mass 73.73 +/- 8.9 kg; VO2max 60.2 +/- 6.3 ml. kg-1.min-1; height 180.3 +/- 5.0 cm; body fat 14.6 +/- 5.4%) were selected from a pool of respondents to our advertisements.<h4>Interventions</h4>Each pair of subjects was measured before and after a 3-week experimental period.<h4>Results</h4>Two (groups) x 3 (2-, 3-and 4-compartment body composition models) ANOVAs were conducted on the difference between the pre- and post-treatment scores for percentage body fat, fat-free mass (FFM) and relative RMR (kJ.kg FFM-1.h-1). No significant between-group differences were identified except for the detraining group's small decrease in FFM (0.7 kg, P = 0.05). The main effects for body composition model were all significant; but the overall differences between the multicompartment models and the 2-compartment one were less than their technical errors of measurement. No significant interaction (P = 0.51) resulted from a 2 x 2 ANOVA on the pre- and post-treatment absolute RMR data for the control (315.2 and 311.9 kJ/h) and detraining groups (325.4 and 325.5 kJ/h).<h4>Conclusions</h4>3-weeks detraining is not associated with a decrease in RMR (kJ/h, kJ.kg FFM-1.h-1) in trained males; hence, our data do not support a potentiation of the RMR via exercise training. The greater sensitivity of the multicompartment models to detect changes in body composition was of marginal value. |
Keywords: | Humans Basal Metabolism Exercise Calorimetry, Indirect Analysis of Variance Body Composition Models, Biological Sports Adult Male |
Rights: | © 1999 Nature Publishing Group |
DOI: | 10.1038/sj.ejcn.1600689 |
Published version: | http://www.nature.com/ejcn/journal/v53/n2/abs/1600689a.html |
Appears in Collections: | Aurora harvest Medicine publications |
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