LOS ANGELES, California / The Los Angeles Times / Health / September 1, 2011
Keeping active won't let you live forever,
but it can stave off the ravages of time.
By Amanda Mascarelli, Special to the Los Angeles Times
• Some types of muscle are lost more quickly than others. You'll lose comparatively more fast-twitch muscle fibers (those that fire quickly and are used in activities like sprinting) than slow-twitch muscle fibers (those that contract slowly and use oxygen efficiently, making them useful for endurance activities). Slow-twitch fibers are lost more slowly because they're called on more often in everyday activities. The plus side of this: Even though aging adults have less muscle mass, their higher proportion of slow-twitch, fatigue-resistant muscle fibers can give them a leg up in endurance activities such as running or cycling.
How much can exercise slow down the ravages of aging? Potentially a lot.
It will partially, but not completely, prevent arterial stiffening with age and completely prevent the dysfunction of the arterial lining that develops with age, Seals says. "Exercise, it turns out, is probably as powerful as any other kind of prevention strategy or treatment that has been assessed so far."
Copyright 2011 Los Angeles Times
Credit: Reports and photographs are property of owners of intellectual rights.
Seniors World Chronicle, a not-for-profit, serves to chronicle and widen their reach.