

L'article en entier, pour connaitre les détails de l'étude et les références :Exercise Makes Our Muscles Work Better With Age
To keep our muscles healthy deep into retirement, we may need to start working out more now, according to a new study of world-class octogenarian athletes. The study found substantial differences at a cellular level between the athletes’ muscles and those of less active people.
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However, motor neurons die as we age, beginning as early as in our 30s, abruptly marooning the attached muscle fiber, leaving it disconnected from the nervous system.
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with each passing decade, we have fewer motor neurons.
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Scientists have not known whether the decline in muscular health with age is inevitable or whether it might be slowed or altered.
There have been encouraging hints that exercise changes the trajectory of muscle aging. A 2010 study of recreational runners in their 60s, for instance, found that their leg muscles contained far more intact muscle units than the muscles of sedentary people of the same age.
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So for the new study, which was published last week in the Journal of Applied Physiology, researchers from McGill University in Canada and other schools contacted 29 world-class track and field athletes in their 80s and invited them to the university’s performance lab. They also recruited a separate group of healthy but relatively inactive people of the same age to act as controls.
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Unsurprisingly, the elite masters athletes’ legs were much stronger than the legs of the other volunteers, by an average of about 25 percent. The athletes had about 14 percent more total muscle mass than the control group.
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But on the plus side, some of them did not start their competotove regimens until they had reached their 50s, providing hope for the dilatory among us.
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http://well.blogs.nytimes.com/2016/03/30/exercise-makes-our-muscles-work-better-with-age/?_r=0
t as raison , y a un peu de ça .... promis cette semaine je vais y faire un tour .Mister Hyde a écrit :Bon, ladefense, quand est-ce que tu arrêtes de poster des vidéos et que tu commences ?
tu es terribleMister Hyde a écrit :Bon, ladefense, quand est-ce que tu arrêtes de poster des vidéos et que tu commences ?
Benoist a écrit :
on commence lundi !Spoiler: