Physical activity and bone health in schoolchildren: the mediating role of fitness and body fat.

ABSTRACT:

Background

The relationship between physical activity (PA) and bone health is well known, although the role of percent body fat (%BF) and fitness as confounders or mediators in this relationship remains uncertain.

Objective

To examine whether the association between PA and bone mineral content (BMC) is mediated by %BF and cardiorespiratory fitness (CRF).

Methods

In this cross sectional study, BMC, total %BF (by DXA), vigorous PA (VPA), CRF, age and height were measured in 132 schoolchildren (62 boys, aged 8-11 years). ANCOVA was used to test differences in BMC by %BF, CRF and VPA, controlling for different sets of confounders. Simple mediation analyses and serial multiple mediation analyses were fitted to examine whether the relationship between PA and BMC is mediated

SUBMITTER: Torres-Costoso A 

PROVIDER: S-EPMC4411135 | biostudies-literature | 2015

REPOSITORIES: biostudies-literature