Validation d'outils adaptés pour l'évaluation de l'endurance cardiorespiratoire chez l'adolescent obèse

摘要

Pédiatrie obesity and its associated diseases hâve become a major public health challenge. However, thé return to daily physical and leisure activities, recommended by most international guidelines, can be difficult for obèse youths, due to low self-esteem, difficulties in integrating groups and poor physical fitness. Overweight combined with sedentarity progressively modify cardio-respiratory exercise tolérance, rendering difficult thé return to exercise and contributing to non-compliance with prescriptions for physical activity. To meet thé growing needs of professionals in thé field of physical activity responsible for thé management of thèse subjects, thé main objective of this doctoral thesis was to validate clinical tools exploring cardiorespiratory capacity in obèse adolescent.A 12 minute walk/run test, an adapted 20m shuttle walk test (starting speed 4 km.b.-1,incréments : 0.5 km.h-1.miir1) and a submaximal exercise test by cycle ergometer with 4 stageswere proposed to calculate indices of cardiorespiratory fitness (D12, Vmax, PMA).Time-varying spectral analysis of heart rate variability was studied to estimate intensitiessubmaximal exercise near ventilatory thresholds.-The "Childhood Obesity Perceived Exertion Scale" (COPE-10) was used to quantify thé intensity of exercise as perceived by thé subjects during exercise.Thèse non-invasive tools, inexpensive, useful in thé évaluation and follow-up of cardiorespiratory fitness in obèse adolescents, can easily be used to develop and personalise adapted re-training programmes in thèse overweight teenagers.