Maximal oxygen consumption is positively associated with resting metabolic rate and better body composition profile. (January 2021)

• Record Type: Journal Article
• Authors: Ebaditabar, Mojdeh; Imani, Hossain; Babaei, Nadia; Davarzani, Samira; Shab-Bidar, Sakineh
• Is Part Of: Obesity medicine. Volume 21(2021)
• Publication Date: 2021-01
• Subjects: Resting metabolic rate -- Body composition -- Cardiorespiratory fitness; Obesity -- Periodicals; Obesity; Obesity; Periodicals; Periodicals; 616.398005
• DOI: 10.1016/j.obmed.2020.100309
• Languages: English
• ISSNs: 2451-8476

Abstract

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. Highlights: There was positive relation between resting metabolic rate and cardiorespiratory fitness. Higher LBM, muscle strength and VO2 max were associated with higher RMR. A linear relation was found between VO2 max and RMR, LBM, PBF and BMI. Negative association was seen between subcutaneous and total abdominal adipose tissue, visceral adipose tissue with VO2 max.