Every research on long distance running and cartilage damage has shown that runners are less prone to arthritis and other degenerative cartilage injuries than non-runners.wow, that was a really rude response from you, connor. this is a forum for ANYONE to use, novice or "serious" as you say. it is easy to attack people. using your rationale, if you were a "serious" runner, you would cut out the p90x an