A lot of folks who develop knee problems while running are experiencing delayed problems from damage they did when they were younger. Yet another major study confirms what I've been saying:
The study also showed that people cannot use the risk of injury as an excuse not to run -- the runners had fewer injuries of all kinds, including to their knees.Actually, that's just an aside to the main article, titled: "Want to Live a Long Life? Run."
Bottom line: Even if you start late in life, running will do good things for your body and mind.
A study in the August issue of the American Journal of Preventive Medicine found no evidence of accelerated rates of osteoarthritis among long-distance runners when compared with healthy nonrunners. "We used to say that osteoarthritis came from wear and tear. That's now revised to say that is can result from tear but not wear," says James Fries, emeritus professor of medicine at the Stanford University School of Medicine and senior author of the study. Moreover, weight-bearing exercise like running helps stave off osteoporosis by maintaining bone mineral density.