Margarita D Tsiros1, Jonathan D Buckley1, Timothy Olds1, Peter R C Howe2, Andrew P Hills3,4, Jeff Walkley5, Rachel Wood6,7, Masaharu Kagawa7,8, Anthony Shield7, Lara Taylor5, Sarah P Shultz9, Paul N Grimshaw10, Kaine Grigg5, Alison M Coates1. 1. 1 Alliance for Research in Exercise, Nutrition and Activity, Sansom Institute for Health Research, University of South Australia , Adelaide, South Australia, Australia . 2. 2 School of Biomedical Sciences and Pharmacy, University of Newcastle , Callaghan, New South Wales, Australia . 3. 3 Mater Research Institute, University of Queensland , South Brisbane, Queensland, Australia . 4. 4 School of Health Sciences, University of Tasmania, Launceston, Tasmania, Australia . 5. 5 School of Health Sciences, RMIT University , Bundoora, Victoria, Australia . 6. 6 Bond Institute of Health and Sport, Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, Australia . 7. 7 School of Exercise and Nutrition Sciences, Queensland University of Technology , Kelvin Grove, Queensland, Australia . 8. 8 Institute of Nutrition Sciences, Kagawa Nutrition University , Saitama, Japan . 9. 9 School of Sport and Exercise, Massey University , Wellington, New Zealand . 10. 10 School of Mechanical Engineering, University of Adelaide , Adelaide, South Australia, Australia .
Abstract
BACKGROUND: This study examined relationships between adiposity, physical functioning, and physical activity. METHODS: Obese (N = 107) and healthy-weight (N = 132) children aged 10-13 years underwent assessments of percent body fat (%BF, dual energy X-ray absorptiometry); knee extensor strength (KE, isokinetic dynamometry); cardiorespiratory fitness (CRF, peak oxygen uptake by cycle ergometry); physical health-related quality of life (HRQOL); and worst pain intensity and walking capacity [six-minute walk (6MWT)]. Structural equation modelling was used to assess relationships between variables. RESULTS: Moderate relationships were observed between %BF and (1) 6MWT, (2) KE strength corrected for mass, and (3) CRF relative to mass (r -0.36 to -0.69, p ≤ 0.007). Weak relationships were found between %BF and physical HRQOL (r -0.27, p = 0.008); CRF relative to mass and physical HRQOL (r -0.24, p = 0.003); physical activity and 6MWT (r 0.17, p = 0.004). Squared multiple correlations showed that 29.6% variance in physical HRQOL was explained by %BF, pain, and CRF relative to mass; while 28.0% variance in 6MWT was explained by %BF and physical activity. CONCLUSIONS: It appears that children with a higher body fat percentage have poorer KE strength, CRF, and overall physical functioning. Reducing percent fat appears to be the best target to improve functioning. However, a combined approach to intervention, targeting reductions in body fat percentage, reductions in pain, and improvements in physical activity and CRF may assist physical functioning.
BACKGROUND: This study examined relationships between adiposity, physical functioning, and physical activity. METHODS: Obese (N = 107) and healthy-weight (N = 132) children aged 10-13 years underwent assessments of percent body fat (%BF, dual energy X-ray absorptiometry); knee extensor strength (KE, isokinetic dynamometry); cardiorespiratory fitness (CRF, peak oxygen uptake by cycle ergometry); physical health-related quality of life (HRQOL); and worst pain intensity and walking capacity [six-minute walk (6MWT)]. Structural equation modelling was used to assess relationships between variables. RESULTS: Moderate relationships were observed between %BF and (1) 6MWT, (2) KE strength corrected for mass, and (3) CRF relative to mass (r -0.36 to -0.69, p ≤ 0.007). Weak relationships were found between %BF and physical HRQOL (r -0.27, p = 0.008); CRF relative to mass and physical HRQOL (r -0.24, p = 0.003); physical activity and 6MWT (r 0.17, p = 0.004). Squared multiple correlations showed that 29.6% variance in physical HRQOL was explained by %BF, pain, and CRF relative to mass; while 28.0% variance in 6MWT was explained by %BF and physical activity. CONCLUSIONS: It appears that children with a higher body fat percentage have poorer KE strength, CRF, and overall physical functioning. Reducing percent fat appears to be the best target to improve functioning. However, a combined approach to intervention, targeting reductions in body fat percentage, reductions in pain, and improvements in physical activity and CRF may assist physical functioning.
Authors: S Nicole Fearnbach; Neil M Johannsen; Corby K Martin; Peter T Katzmarzyk; Robbie A Beyl; Daniel S Hsia; Owen T Carmichael; Amanda E Staiano Journal: Pediatr Exerc Sci Date: 2020-04-25 Impact factor: 2.333
Authors: Miguel A Perez-Sousa; Pedro R Olivares; Juan A Escobar-Alvarez; Jose A Parraça; Narcis Gusi Journal: Health Qual Life Outcomes Date: 2018-07-31 Impact factor: 3.186
Authors: S Nicole Fearnbach; Corby K Martin; Steven B Heymsfield; Amanda E Staiano; Robert L Newton; Alex C Garn; Neil M Johannsen; Daniel S Hsia; Owen T Carmichael; Sreekrishna Ramakrishnapillai; Kori B Murray; John E Blundell; Graham Finlayson Journal: Int J Behav Nutr Phys Act Date: 2020-08-24 Impact factor: 6.457