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. 2016 Jul;28(4):584-6.
doi: 10.1002/ajhb.22813. Epub 2015 Dec 1.

The relation between physical activity, fitness, and fatness in adolescents: A mediation analysis

Sigurbjörn Árni Arngrímsson  1 , Anna SigríĐur Ólafsdóttir  1
Affiliations

The relation between physical activity, fitness, and fatness in adolescents: A mediation analysis

Sigurbjörn Árni Arngrímsson et al. Am J Hum Biol. 2016 Jul.

Abstract

Objectives: To investigate the total, direct and mediated (by fatness) association of physical activity (PA) with fitness.

Methods: Body fat percentage (%Fat), maximal oxygen uptake (VO2max ) and PA were measured directly in 18-year-olds (n=202) and their association analyzed with a linear regression-based mediation analysis after controlling for sex.

Results: The total association between PA and VO2max was significant (c=0.66, P<0.001) and was significantly mediated by %Fat (ab=0.25, 95% CI: 0.04-0.49). The direct association was also significant (ć=0.41, P<0.001).

Conclusion: Physical activity is associated with VO2max in 18-year-old adolescents but a little over a third of that association is mediated by %Fat. Regardless of fatness, PA is important for fitness in this age group. Am. J. Hum. Biol. 28:584-586, 2016. © 2015 Wiley Periodicals, Inc.

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