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#1 12-03-2018 08:43:32

xiaoxiangyu
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Date d'inscription: 11-04-2016
Messages: 988

total d'oxygène nécessaire

Le premier résultat d'intérêt est l'hématocrite, mesuré une semaine avant les championnats. C'était "seulement" 43,7%. Je dis ?seulement? parce que dans un autre sport d'endurance, le cyclisme, je soup?onne que beaucoup de coureurs ne sortiraient même pas du lit en tirant sur leurs maillots si c'était aussi bas! En fait, la valeur de 44% est à peu près dans la fourchette normale, étant donné qu'il effectuait un volume d'entra?nement modéré à élevé au moment du test (environ 150 km / semaine).

Les auteurs ont suggéré que cette mesure, ainsi que d'autres résultats que nous n'aborderons pas ici, indique ?pas de manipulations pour augmenter artificiellement la capacité de transport de l'oxygène dans le sang? et ?pas de stimulation artificielle de l'érythropo?èse?. Je suis s?r que les sceptiques sont là (ils le signaleraient difficilement si son taux d'hématocrite était de 58%, n'est-ce pas!), Mais nous irons de pair avec celui-là. Entrons dans l'économie courante.

Nous avons présenté hier le concept d'économie courante, mais il vaut la peine de le répéter. L'économie de la course est une mesure de la quantité d'oxygène (ou peu, selon le cas) que le coureur utilise pour une vitesse donnée, sous-maximale. En théorie, deux coureurs peuvent avoir la même capacité maximale d'utilisation de l'oxygène (appelée VO2max), puis celui qui est le plus économique aux vitesses sous-maximales sera probablement le meilleur Adidas Tubular Womens coureur.

Il y a donc deux mesures à prendre en compte ici. Le premier est le MAXIMUM - le VO2max. La seconde est l'utilisation de l'oxygène au niveau sub-max, ce qui nous indique à quel point Tadese est économique.

La VO2max de Zersenay Tadese était de 83 ml / kg / min. C'est une mesure très élevée, mais cela est attendu d'un coureur de longue distance de classe mondiale. Comparé à d'autres athlètes de classe mondiale, la valeur de Tadese ?dispara?t? dans la foule. En d'autres termes, si nous avons aligné un groupe de valeurs VO2max d'un athlète et que nous vous avons demandé de choisir le double champion du monde basé sur VO2max seul, il y a de fortes chances que vous vous trompiez! Tout comme vous auriez eu complètement tort quand vous deviez deviner que Derek Clayton pouvait courir un marathon de 2h08 avec sa VO2max de "seulement" Adidas Nmd Hombre 69 ml / kg / min.

Bien s?r, quand il s'agit de VO2max, il y a beaucoup de battage autour des mesures. C'est devenu une sorte de légende urbaine, un peu comme la taille du poisson que vous avez attrapé lors de votre dernière expédition de pêche qui prend de l'ampleur chaque fois que vous racontez l'histoire! Greg Lemond avait donc un VO2 max de 92,5 ml / kg / min, le skieur de fond Bjorn Daehlie était à 96 ml / kg / min hors saison, et le physiologiste qui l'a testé a prédit que il serait au-dessus de 100 ml / kg / min quand il était "en forme"! Nous sommes s?rs que vous pouvez raconter vos propres histoires de cette mesure super-humaine!

Premièrement, nous devons d'abord comprendre ce qu'ils mesurent. Ils ont mesuré l'économie courante comme le volume total d'oxygène nécessaire pour parcourir 1 kilomètre. Ceci est vraiment important, Nike Air Max 95 Mujer car il y a des preuves, montrées dans la figure ci-dessous, que ce volume total ne varie pas trop avec la vitesse de course. En d'autres termes, quelle que soit la vitesse à laquelle vous courez, vous utilisez plus ou moins le même volume d'oxygène pour courir 1 kilomètre! Bien s?r, il y aura des individus qui ne suivront pas vraiment cette tendance, et donc certains coureurs deviendront plus ou moins efficaces car ils courront plus vite, mais en général, ?a reste similaire.

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#2 13-03-2018 11:43:51

SocialWork
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Date d'inscription: 13-03-2018
Messages: 37

Re: total d'oxygène nécessaire

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