Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate
The purpose of the study was to examine differences in body fat percentage (BF%) across groups stratified by resting metabolic rate (RMR) when normalized to body weight. National Collegiate Athletic Association Division III athletes (<i>n</i> = 190; Age: 19.8 ± 1.4 year; Body Mass: 79.3...
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2024-10-01
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| author | Jennifer B. Fields Andrew T. Askow Margaret T. Jones Andrew R. Jagim |
| author_facet | Jennifer B. Fields Andrew T. Askow Margaret T. Jones Andrew R. Jagim |
| author_sort | Jennifer B. Fields |
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| description | The purpose of the study was to examine differences in body fat percentage (BF%) across groups stratified by resting metabolic rate (RMR) when normalized to body weight. National Collegiate Athletic Association Division III athletes (<i>n</i> = 190; Age: 19.8 ± 1.4 year; Body Mass: 79.3 ± 20.2 kg; Height: 175.0 ± 9.3 cm, Body Mass Index: 25.6 ± 4.9 kg/m<sup>2</sup>) participated in this cross-sectional mixed cohort study. Body composition was assessed using air displacement plethysmography. RMR was assessed using indirect calorimetry. For each sex, tertiles were determined and used to create low, moderate, and high relative RMR groups as follows: low (M: <26 kcal/kg; F: <24 kcal/kg), moderate (M: 26.1–29.0 kcal/kg; F: 24.1–27.0 kcal/kg), and high (M: >29.1 kcal/kg; F: >27.1 kcal/kg). The mean ± standard deviation RMR for male and female athletes was 27.9 ± 3.2 and 25.9 ± 2.8 kcals/kg when expressed relative to body weight. When stratified by sex, males in the low RMR group had significantly higher BF% values than those in the moderate (mean difference, [95% confidence intervals]) (7.2, [2.4, 12.0] kcal/kg; <i>p</i> < 0.01) and high RMR groups (7.7, [2.9, 12.5] kcal/kg; <i>p</i> < 0.001). Female athletes in the moderate RMR group had higher body fat percentages than those in the high RMR group (mean difference, [95% confidence intervals]) (5.8, [2.4, 9.2] kcal/kg; <i>p</i> < 0.01). Female athletes in the moderate relative RMR group had higher BF% values than those in the higher relative RMR group (3.3, [−0.1, 6.7] kcal/kg; <i>p</i> = 0.049). Both male and female athletes with a low relative RMR had a higher BF%. |
| format | Article |
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| institution | OA Journals |
| issn | 2076-3417 |
| language | English |
| publishDate | 2024-10-01 |
| publisher | MDPI AG |
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| series | Applied Sciences |
| spelling | doaj-art-777b40cb5f40482fbcf1dee7f513bda32025-08-20T02:13:16ZengMDPI AGApplied Sciences2076-34172024-10-011421994910.3390/app14219949Differences in Body Fat in Athletes Categorized by Resting Metabolic RateJennifer B. Fields0Andrew T. Askow1Margaret T. Jones2Andrew R. Jagim3Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USADepartment of Kinesiology and Community Health, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USAPatriot Performance Laboratory, Frank Pettrone Center for Sports Performance, George Mason University, Fairfax, VA 22030, USASports Medicine, Mayo Clinic Health System, Onalaska, WI 54650, USAThe purpose of the study was to examine differences in body fat percentage (BF%) across groups stratified by resting metabolic rate (RMR) when normalized to body weight. National Collegiate Athletic Association Division III athletes (<i>n</i> = 190; Age: 19.8 ± 1.4 year; Body Mass: 79.3 ± 20.2 kg; Height: 175.0 ± 9.3 cm, Body Mass Index: 25.6 ± 4.9 kg/m<sup>2</sup>) participated in this cross-sectional mixed cohort study. Body composition was assessed using air displacement plethysmography. RMR was assessed using indirect calorimetry. For each sex, tertiles were determined and used to create low, moderate, and high relative RMR groups as follows: low (M: <26 kcal/kg; F: <24 kcal/kg), moderate (M: 26.1–29.0 kcal/kg; F: 24.1–27.0 kcal/kg), and high (M: >29.1 kcal/kg; F: >27.1 kcal/kg). The mean ± standard deviation RMR for male and female athletes was 27.9 ± 3.2 and 25.9 ± 2.8 kcals/kg when expressed relative to body weight. When stratified by sex, males in the low RMR group had significantly higher BF% values than those in the moderate (mean difference, [95% confidence intervals]) (7.2, [2.4, 12.0] kcal/kg; <i>p</i> < 0.01) and high RMR groups (7.7, [2.9, 12.5] kcal/kg; <i>p</i> < 0.001). Female athletes in the moderate RMR group had higher body fat percentages than those in the high RMR group (mean difference, [95% confidence intervals]) (5.8, [2.4, 9.2] kcal/kg; <i>p</i> < 0.01). Female athletes in the moderate relative RMR group had higher BF% values than those in the higher relative RMR group (3.3, [−0.1, 6.7] kcal/kg; <i>p</i> = 0.049). Both male and female athletes with a low relative RMR had a higher BF%.https://www.mdpi.com/2076-3417/14/21/9949metabolismbody compositionsportsbody massmetabolic adaptation |
| spellingShingle | Jennifer B. Fields Andrew T. Askow Margaret T. Jones Andrew R. Jagim Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate Applied Sciences metabolism body composition sports body mass metabolic adaptation |
| title | Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate |
| title_full | Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate |
| title_fullStr | Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate |
| title_full_unstemmed | Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate |
| title_short | Differences in Body Fat in Athletes Categorized by Resting Metabolic Rate |
| title_sort | differences in body fat in athletes categorized by resting metabolic rate |
| topic | metabolism body composition sports body mass metabolic adaptation |
| url | https://www.mdpi.com/2076-3417/14/21/9949 |
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