This article was originally posted by Ryan at the original HillRunner.com Blogs.
I’ve never really bought the idea that running is bad for your knees. I know anecdotal evidence isn’t always sound but my experience has always been that long time runners who didn’t have pre-existing conditions were as healthy as, if not more than, less active people. Now, not only do we have evidence that the widely held claim that running causes knee arthritis is false. We have an explanation for why this might be.