Abstract
Objective: To investigate the relationships between resting metabolic rate (RMR) and respiratory exchange ratio (RER) and subsequent changes in body size and fatness.
Design: Prospective longitudinal observational study.
Participants: A sample of 147 participants (76 males, 71 females) 18–68 y of age were followed for approximately 5½ y.
Measures: At baseline, post-absorptive RMR and RER were determined by indirect calorimetry and adjusted for the effects of age, body mass and subcutaneous fatness using regression procedures. Indicators of body size and fatness included body mass, waist circumference, and the sum of six skinfolds. Changes in these indicators (delta scores) were adjusted for age and length of the follow-up period using regression.
Results: Correlations between baseline RMR, RER and subsequent changes in the indicators of body fatness were uniformly low and not significant (range −0.05–0.16). Further, Cox proportional hazards regression analyses indicated that neither RMR nor RER were significant predictors of gains in body mass, waist circumference, or the sum of six skinfolds.
Conclusions: There is no association between RMR or RER and changes in indicators of body size and fatness over 5½ y of follow-up in this sample.
Sponsorship: This research was supported by The Polar Research Grant on Controlled Heart Rate Zone Exercise from the American College of Sports Medicine Foundation (P.T.K.). The Québec Family Study is currently supported by grants from the Medical Research Council of Canada (PG-11811, GR15187 and MT-13960). C. Bouchard is funded, in part, by the George A. Bray Chair in Nutrition.
European Journal of Clinical Nutrition (2000) 54, 610–614
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Guarantor: Peter T Katzmarzyk.
Contributors: PTK analysed the data and wrote the manuscript; LP aided in interpretation of results and writing of manuscript; AT aided in interpretation of results and writing of manuscript; CB was responsible for design and conception of the study and data collection, he also aided in writing the manuscript.
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Katzmarzyk, P., Pérusse, L., Tremblay, A. et al. No association between resting metabolic rate or respiratory exchange ratio and subsequent changes in body mass and fatness: 5½ year follow-up of the Québec Family Study. Eur J Clin Nutr 54, 610–614 (2000). https://doi.org/10.1038/sj.ejcn.1601053
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DOI: https://doi.org/10.1038/sj.ejcn.1601053
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