Phys Ed: Can Running Actually Help Your Knees? - Well Blog - NYTimes.com

These studies partially explain my experience with knee pain. I think they underestimate the value of increased flexibility in the hips and ankles. I also suspect that regular modest stress brings more blood flow to the joint facilitating regeneration. Finally, I suspect anti-inflammatory help slow down degeneration because the degeneration is caused by the inflamation itself -- at least partially.

Phys Ed: Can Running Actually Help Your Knees? - Well Blog - NYTimes.com: "An article in Skeletal Radiology, a well-respected journal, created something of a sensation in Europe last year. It reported that researchers from Danube Hospital in Austria examined the knees of marathon runners using M.R.I. imaging, before and after the 1997 Vienna marathon. Ten years later, they scanned the same runners’ knees again. The results were striking. “No major new internal damage in the knee joints of marathon runners was found after a 10-year interval,” the researchers reported."