Physical activity volume and intensity distribution in relation to bone, lean and fat mass in children
Skinner, A. M., Vlachopoulos, D., Barker, A. R., Moore, S. A., Rowlands, A. V., Soininen, S., Haapala, E. A., Väistö, J., Westgate, K., Brage, S., & Lakka, T. A. (2023). Physical activity volume and intensity distribution in relation to bone, lean and fat mass in children. Scandinavian Journal of Medicine and Science in Sports, 33(3), 267-282. https://doi.org/10.1111/sms.14255
© 2022 The Authors. Scandinavian Journal of Medicine & Science In Sports published by John Wiley & Sons Ltd.
Considering physical activity (PA) volume and intensity may provide novel insights into the relationships of PA with bone, lean, and fat mass. This study aimed to assess the associations of PA volume, PA intensity distribution, including moderate-to-vigorous PA (MVPA) with total-body-less-head bone mineral content (BMC), lean, and fat mass in children. A population sample of 290 Finnish children (158 females) aged 9–11 years from the Physical Activity and Nutrition in Children (PANIC) Study was studied. PA, including MVPA, was assessed with a combined heart rate and movement sensor, and the uniaxial acceleration was used to calculate average-acceleration (a proxy metric for PA volume) and intensity-gradient (reflective of PA intensity distribution). Linear regression analyzed the associations of PA volume, PA intensity and MVPA with BMC, lean mass, and fat mass assessed by dual-energy X-ray absorptiometry. PA volume was positively associated with BMC in females (unstandardised regression coefficient [ß] = 0.26) and males (ß = 0.47), and positively associated with lean (ß = 7.33) and negatively associated with fat mass in males (ß = −20.62). PA intensity was negatively associated with BMC in males (ß = −0.13). MVPA was positively associated with lean mass in females and males (ß = 0.007 to 0.012), and negatively associated with fat mass in females and males (ß = −0.030 to −0.029). PA volume may be important for improving BMC in females and males, and increasing lean and reducing fat mass in males, whereas MVPA may be important for favorable lean and fat outcomes in both sexes. ...
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Additional information about fundingThis work was financially supported by grants from the Ministry of Education and Culture of Finland, Ministry of Social Affairs and Health of Finland, Finnish Innovation Fund Sitra, Social Insurance Institution of Finland, Finnish Cultural Foundation, Juho Vainio Foundation, Foundation for Pediatric Research, Doctoral Programs in Public Health, Paavo Nurmi Foundation, Paulo Foundation, Diabetes Research Foundation, The Finnish Medical Society Duodecim, Orion Research Foundation sr, Research Committee of the Kuopio University Hospital Catchment Area (State Research Funding), Kuopio University Hospital (previous state research funding [EVO], funding number 5031343) and the city of Kuopio. SB and KW were supported by the UK Medical Research Council (MC_UU_12015/3 and MC_UU_00006/4) and the NIHR Cambridge Biomedical Research Centre (IS-BRC-1215-20 014). AR is supported by the National Institute for Health Research (NIHR) Leicester Biomedical Research Centre, the NIHR Applied Research Collaborations—East Midlands. The funders had no role in the design and conduct of the study; collection, management, analysis, and interpretation of the data; preparation, review, or approval of the manuscript; and decision to submit the manuscript for publication. ...
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