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  1. Physical activity and health-related fitness in youth : a multivariate analysis.

    Article - En anglais

    Purpose 

    To evaluate the relationship between indicators of physical activity and health-related fitness in youth 9 - 18 yr.

    Methods 

    A cross-sectional sample of 356 boys and 284 girls 9-18 yr of age from phase I of the Quebec Family Study was studied.

    The sample was divided into three age groups by gender, 9-12,13-15, and 16-18 yr of age.

    Physical activity variables included two estimates of activity, estimated daily energy expenditure (EE) and estimated moderate-to-vigorous physical activity (MVPA), and one estimate of inactivity, time spent watching television per day (TVTIME).

    Health-related fitness variables were the sum of six skin folds (SUM), number of sit-ups in I min (SITUP), physical work capacity at 150 beats. min (PWC150), and static strength of the leg (LMS).

    Partial canonical correlation was used to quantify the relationship between standardized (z-transformed) activity variables and health-related fitness items, controlling for age.

    Results 

    There is a weak to moderate association between physical activity and fitness in youth.

    The first activity canonical variate is a function of positive loadings for EE and MVPA, with a smaller, negative loading for TVTIME.

    The first fitness variate generally includes positive loadings for PWC150 and SITUP, with a small negative loading for the SUM and a small positive loading for LMS.

    The first canonical correlations indicate that the variance shared by the fitness and activity variates ranges from 11 to 21%. (...)

    Mots-clés Pascal : Aptitude physique, Dépense énergétique, Adulte jeune, Homme, Corrélation canonique, Etude familiale, Québec, Canada, Amérique du Nord, Amérique, Exercice physique, Analyse multivariable, Facteur risque, Epidémiologie, Adolescent

    Mots-clés Pascal anglais : Physical fitness, Energetic cost, Young adult, Human, Canonical correlation, Family study, Quebec, Canada, North America, America, Physical exercise, Multivariate analysis, Risk factor, Epidemiology, Adolescent

    Logo du centre Notice produite par :
    Inist-CNRS - Institut de l'Information Scientifique et Technique

    Cote : 98-0297413

    Code Inist : 002A24. Création : 27/11/1998.