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Maximal Oxygen Consumption Is Positively Associated With Resting Metabolic Rate and Better Body Composition Profile Publisher



Ebaditabar M1 ; Imani H2 ; Babaei N1 ; Davarzani S1 ; Shabbidar S1
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Authors Affiliations
  1. 1. Community Nutrition Department, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran
  2. 2. Clinical Nutrition Department, School of Nutritional Sciences and Dietetics, Tehran University of Medical Sciences (TUMS), Tehran, Iran

Source: Obesity Medicine Published:2021


Abstract

Aims: It was investigated that regular exercise improves cardiorespiratory fitness (CRF) and lean body mass (LBM). Considering the effect of CRF on LBM as factors influencing resting metabolic rate (RMR), there might be a relation between CRF and RMR. The purpose of this study was to investigate the relation between CRF and RMR among Iranian adults. Methods: 271 subjects participated in this study. Body composition (multi-frequency bio-impedance), RMR (indirect calorimetry), Maximal oxygen consumption (Bruce protocol) was measured. Student's t-test test and χ2 analysis were performed to compare two groups of RMR and also RER. Polynomial model fit was also obtained to assess departure from linearity. Results: Participants with higher RMR had significantly higher VO2max (34.44 ± 8.47 vs. 29.94 ± 7.16, P < 0.001) and LBM (49.68 ± 12.41 vs. 46.53 ± 11.10, P = 0.04) compared with other groups. In contrast, people in the lower RMR group had a higher body fat mass (23.31 ± 9.40 vs. 20.38 ± 9.30, P = 0.02), visceral fat mass (10.29 ± 4.44 vs. 8.75 ± 4.76, P = 0.01), and trunk fat (12.66 ± 4.72 vs. 10.93 ± 4.66, P = 0.02). Conclusion: We found a positive association between VO2max and RMR with a better body composition profile. Therefore, enhancing VO2max which shows the better CRF may be recommended as a strategy to prevent obesity prevalence and effective weight loss program. © 2020 Elsevier Ltd
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