Adiposity is related to decrements in cardiorespiratory fitness in obese and normal-weight children
Article
Article Title | Adiposity is related to decrements in cardiorespiratory fitness in obese and normal-weight children |
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ERA Journal ID | 13915 |
Article Category | Article |
Authors | Tsiros, M. D. (Author), Coates, A. M. (Author), Howe, P. R. C. (Author), Walkley, J. (Author), Hills, A. P. (Author), Wood, R. E. (Author) and Buckley, J. D. (Author) |
Journal Title | Pediatric Obesity |
Journal Citation | 11 (2), pp. 144-150 |
Number of Pages | 7 |
Year | 2016 |
Place of Publication | United Kingdom |
ISSN | 1747-7166 |
1747-7174 | |
2047-6302 | |
2047-6310 | |
Digital Object Identifier (DOI) | https://doi.org/10.1111/ijpo.12037 |
Web Address (URL) | http://onlinelibrary.wiley.com/doi/10.1111/ijpo.12037/epdf |
Abstract | Background: Obese children are typically less physically active than their normal-weight peers and are often assumed to be 'unfit'. Objective Investigate the relationships between adiposity, physical activity levels and cardiorespiratory fitness (CRF) in obese and normal-weight children. A secondary aim was to examine obese/normal-weight differences in CRF. Methods Obese (N = 107) and normal-weight (N = 132) 10-13-year-olds participated. Fat-free mass (FFM), percent fat, physical activity and peak oxygen uptake (VO2peak) were assessed. Analyses were adjusted for socioeconomic status (SES). Results Higher percent fat was inversely associated with VO2peak normalized for mass (r = -0.780, P < 0.001) even after controlling for physical activity (r = -0.673, P < 0.001). While higher percent fat was also inversely associated with VO2peak normalized for FFM, this was only significant in males (r = -0.247, P = 0.004) and did not persist after controlling for physical activity (r = -0.059 P = 0.526). Compared with normal-weight children, obese children had higher absolute VO2peak, lower VO2peak corrected for mass (P ≤ 0.009) and lower VO2peak corrected for FFM (P = 0.041) that did not persist after controlling for SES (P = 0.086). Conclusion Obesity-related inefficiencies in CRF were evident. Higher adiposity was associated with poorer CRF relative to mass, irrespective of physical activity levels. However, low physical activity levels may be responsible for associations between adiposity and CRF relative to FFM seen in boys, indicating the importance of encouraging physical activity. |
Keywords | Body mass index; child; cycle ergometry; peak oxygen uptake; Adiposity; Australia; Body Mass IndexCardiovascular Physiological Phenomena; Child; Female; Pediatric Obesity; Physical Fitness; Respiratory Physiological Phenomena |
ANZSRC Field of Research 2020 | 321599. Reproductive medicine not elsewhere classified |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | University of South Australia |
Royal Melbourne Institute of Technology (RMIT) | |
University of Queensland | |
Queensland University of Technology | |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q40y4/adiposity-is-related-to-decrements-in-cardiorespiratory-fitness-in-obese-and-normal-weight-children
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