Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study

The relationship between sport participation and BMI in children and adolescents is unclear, with some studies showing no association at all and others suggesting that sport is linked to lower BMI. Another possibility, however, is that this relationship is bidirectional, with sport leading to lower...

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Main Authors: John Cairney, Scott Veldhuizen
Format: Article
Language:English
Published: Elsevier 2017-06-01
Series:Preventive Medicine Reports
Subjects:
Online Access:http://www.sciencedirect.com/science/article/pii/S2211335517300682
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author John Cairney
Scott Veldhuizen
author_facet John Cairney
Scott Veldhuizen
author_sort John Cairney
collection DOAJ
description The relationship between sport participation and BMI in children and adolescents is unclear, with some studies showing no association at all and others suggesting that sport is linked to lower BMI. Another possibility, however, is that this relationship is bidirectional, with sport leading to lower BMI but BMI also influencing sport participation. Here, we examine the direction of this association by analyzing a longitudinal dataset. Data come from the Physical Health Activity Study Team (PHAST) study, a prospective open cohort study including 2278 children at baseline, followed from 2004 to 2010. We fit 3 lagged mixed effects models: One examining the simultaneous relationship, one regressing past BMI on present sport participation, and one regressing sport participation on present BMI. Our baseline sample included 1999 children, of whom 50% were female. Mean BMI increased over the study period from 19.0 (SD = 3.7) to 21.2 (SD = 4.1), while organized sport participation declined. Model results showed that BMI and sport are weakly associated, and that each of these variables predicts the other, which generally supports a bidirectional relationship. Consistent with some previous reports, however, the effect size in both directions is very small. At the levels of participation in our sample, activity and BMI are very weakly related. Findings should not obscure the other benefits of physical activity.
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spelling doaj.art-afc431d32ca343f0bab1caddb5d6e5e72022-12-21T18:49:56ZengElsevierPreventive Medicine Reports2211-33552017-06-016C33633810.1016/j.pmedr.2017.04.005Organized sport and physical activity participation and body mass index in children and youth: A longitudinal studyJohn Cairney0Scott Veldhuizen1Faculty of Kinesiology and Physical Education, University of Toronto, CanadaDepartment of Family Medicine, McMaster University, CanadaThe relationship between sport participation and BMI in children and adolescents is unclear, with some studies showing no association at all and others suggesting that sport is linked to lower BMI. Another possibility, however, is that this relationship is bidirectional, with sport leading to lower BMI but BMI also influencing sport participation. Here, we examine the direction of this association by analyzing a longitudinal dataset. Data come from the Physical Health Activity Study Team (PHAST) study, a prospective open cohort study including 2278 children at baseline, followed from 2004 to 2010. We fit 3 lagged mixed effects models: One examining the simultaneous relationship, one regressing past BMI on present sport participation, and one regressing sport participation on present BMI. Our baseline sample included 1999 children, of whom 50% were female. Mean BMI increased over the study period from 19.0 (SD = 3.7) to 21.2 (SD = 4.1), while organized sport participation declined. Model results showed that BMI and sport are weakly associated, and that each of these variables predicts the other, which generally supports a bidirectional relationship. Consistent with some previous reports, however, the effect size in both directions is very small. At the levels of participation in our sample, activity and BMI are very weakly related. Findings should not obscure the other benefits of physical activity.http://www.sciencedirect.com/science/article/pii/S2211335517300682SportBMIChildren
spellingShingle John Cairney
Scott Veldhuizen
Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
Preventive Medicine Reports
Sport
BMI
Children
title Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
title_full Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
title_fullStr Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
title_full_unstemmed Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
title_short Organized sport and physical activity participation and body mass index in children and youth: A longitudinal study
title_sort organized sport and physical activity participation and body mass index in children and youth a longitudinal study
topic Sport
BMI
Children
url http://www.sciencedirect.com/science/article/pii/S2211335517300682
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