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  1. Continuous heart rate monitoring over 1 week in teenagers aged 11-16 years.

    Article - En anglais

    Heart rate (HR) was monitored in 66 French pubertal boys (B, n=28) and girls (G, n=38) aged 11-16 years to evaluate habitual physical activity (HPA) over a 1-week period in the winter.

    The HR and the percentage of heart rate reserve (% HRR) were taken to be indexes of the metabolic activity for the whole day and for the different parts of the day.

    The HPA was evaluated from the time spent each day below 50% HRR, between 50% - 70% HRR and above 70% HRR, which related to the time spent in no or low physical activity (NLPA), moderate physical activity (MPA) and vigorous physical activity (VPA), respectively.

    No sex differences were observed in the average% HRR each day {% HRRmean, [B 30 (SD 4)% ; G 32 (SD 4)% ]} or in NLPA [B 715 (SD 61) min, G 711 (SD 81) min] and VPA [B 19 (SD 16) min, G 21 (SD 21) min] throughout the week.

    During school days, daily% HRRmean was 7% smaller in 14-16 year olds compared to 11-13 year olds.

    This was linked to a decrease in MPA and a concomitant increase in NLPA (P<0.05).

    Daily% HRRmean varied significantly during the week (range : 28-34% HRR).

    There were significant differences among the periods of the day (P<0.05).

    The HR was the greatest during physical education lessons [128 (SD 11) beats. min-1], recreation [113 (SD 15) beats min-1] and lunch break [108 (SD 12) beats min-1] and the lowest during the evening [94 (SD 10) beats min-1]. It was only during the lunch breaks that% HRRmean was greater (P<0.05) on school days than on free days. (...)

    Mots-clés Pascal : Rythme cardiaque, Monitorage, Exercice physique, Quotidien, France, Europe, Epidémiologie, Rythme circadien, Age, Sexe, Variation saisonnière, Rythme biologique, Adolescent, Homme

    Mots-clés Pascal anglais : Heart rate, Monitoring, Physical exercise, Daily, France, Europe, Epidemiology, Circadian rhythm, Age, Sex, Seasonal variation, Biological rhythm, Adolescent, Human

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

    Cote : 98-0036847

    Code Inist : 002A22C. Création : 17/04/1998.