Papers by Comlavi Guinhouya
Http Www Theses Fr, 2006
Les causes de la surcharge ponderale infantile sont multifactorielles. Mais l'augmentation ra... more Les causes de la surcharge ponderale infantile sont multifactorielles. Mais l'augmentation rapide de sa prevalence semble indiquer que les facteurs comportementaux et environementaus en sont les determinants principaux. Ces facteurs ont souvent ete etudies comme des entites unitaires. L''bjectif de cette these etait donc de proposer au travers d'un deroule methodologique, une approche globale pour l'analyse des relations et interactions entre differents facteurs comportementaux et environnementaux determinant la surcharge ponderale infantile. Trois etudes ont permis de clarifier les problemes de mesure et d'evaluation concernant la definition de la surcharge ponderale et ceux inherents aux parametres des comportements de mouvement des enfants. La quatrieme etude a permis de mettre en evidence les mecanismes d'actions associant les differents parametres comportementaux et environnementaux impliques dans la surcharge ponderale de l'enfant. Ainsi, le cadre de vie des enfants et leurs comportements individuels vis-a-vis de l'activite physique et de l'alimentation semblent determiner leur niveau de risque en regard du surpoids/obesite. Sur la base de ces resultats nous avons pu proposer des actions preventives et/ou correctives basees sur l'ecole ou la famille lors d'une cinquieme etude.
Medicine & Science in Sports & Exercise, 2004
Purpose: To compare the effects of passive versus active recovery on muscle oxygenation and on th... more Purpose: To compare the effects of passive versus active recovery on muscle oxygenation and on the time to exhaustion for high-intensity intermittent exercises. Methods: Twelve male subjects performed a graded test and two intermittent exercises to exhaustion. The intermittent exercises (15 s) were alternated with recovery periods (15 s), which were either passive or active recovery at 40% of V O 2max . Oxyhemoglobin was evaluated by near-infrared spectroscopy during the two intermittent exercises. Results: Time to exhaustion for intermittent exercise alternated with passive recovery (962 Ϯ 314 s) was significantly longer (P Ͻ 0.001) than with active recovery (427 Ϯ 118 s). The mean metabolic power during intermittent exercise alternated with passive recovery (48.9 Ϯ 4.9 mL·kg Ϫ1 ·min Ϫ1 ) was significantly lower (P Ͻ 0.001) than during intermittent exercise alternated with active recovery (52.6 Ϯ 4.6 mL·kg Ϫ1 ·min Ϫ1 ). The mean rate of decrease in oxyhemoglobin during intermittent exercises alternated with passive recovery (2.9 Ϯ 2.4%·s Ϫ1 ) was significantly slower (P Ͻ 0.001) than during intermittent exercises alternated with active recovery (7.8 Ϯ 3.4%·s Ϫ1 ), and both were negatively correlated with the times to exhaustion (r ϭ 0.67, P Ͻ 0.05 and r ϭ 0.81, P Ͻ 0.05, respectively). Conclusion: The longer time to exhaustion for intermittent exercise alternated with passive recovery could be linked to lower metabolic power. As intermittent exercise alternated with passive recovery is characterized by a slower decline in oxyhemoglobin than during intermittent exercise alternated with active recovery at 40% of V O 2max , it may also allow a higher reoxygenation of myoglobin and a higher phosphorylcreatine resynthesis, and thus contribute to a longer time to exhaustion.
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Papers by Comlavi Guinhouya