logo BDSP

Base documentaire


Votre avis nous intéresse

Le réseau BDSP met en oeuvre un projet d'innovation et d'amélioration de ses services, dans le souci constant de proposer des contenus de qualité adaptés aux besoins des utilisateurs.

Identifier de nouvelles sources de financements est la condition nécessaire pour assurer la poursuite et la pérennité de cet outil unique qu'est la BDSP, tout en le faisant évoluer.

Pour définir un nouveau modèle économique, nous avons besoin de votre avis : merci de répondre à notre enquête (temps estimé : 5 minutes).

Participer maintenant
Participer plus tard J'ai déjà participé

  1. Ethnicity affects aerobic fitness in U.S. adolescent girls.

    Article - En anglais

    The purpose of this investigation was to determine whether aerobic fitness (VO2max) differed between black (N=40) and white (N=53) adolescent girls who were similar in age (13.5 yr) and percent body fat (24.6%). Expired gases were collected continuously while each girl performed a standard Bruce protocol to volitional exhaustion on a motorized treadmill (TM).

    Heart rates (HR) were measured during the exercise testing via telemetry.

    Fat-free mass (FFM) was estimated with total body electrical conductivity (TOBEC).

    Average (± SD) maximum HR (black=194 ± 7 ; white=198 ± 8) and respiratory exchange ratios (black=1.17 ± 0.08 ; white=1.22 ± 0.09) did not differ between subject groups.

    Aerobic fitness was significantly (P<0.01) lower in black versus white girls when VO2max was expressed relative to body weight (31.8 ± 5.8 vs 38.5 ± 6.8 ml. kg-1. min-1) and body weight raised to the 0.67 power (120.9 ± 19.5 vs 138.5 ± 20.7 ml. kg-0.67. min-1).

    Treadmill time to exhaustion was significantly less (P<0.01) in the black (8.49 ± 1.30 min) versus white (9.41 ± 1.60) subjects.

    Also, black subjects demonstrated less ability to utilize O2 during maximal exercise at a given FFM.

    This suggests the black girls'FFM contained a smaller percentage of skeletal muscle mass that could be utilized during treadmill exercise.

    It is possible that lower aerobic fitness values seen in the black girls are related to a combination of anatomical, physiological and/or behavioral factors.

    Mots-clés Pascal : Femelle, Origine ethnique, Aptitude physique, Noir américain, Exercice physique, Epreuve tapis roulant, Etats Unis, Amérique du Nord, Amérique, Epidémiologie, Caucasoïde, Négroïde, Consommation oxygène maximum, Race, Adolescent, Homme

    Mots-clés Pascal anglais : Female, Ethnic origin, Physical fitness, Black American, Physical exercise, Treadmill exercise, United States, North America, America, Epidemiology, Caucasoid, Negroid, Maximum oxygen consumption, Race, Adolescent, Human

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

    Cote : 96-0069793

    Code Inist : 002B29A. Création : 199608.