torn labrium from running [hip impingement] is normally thought to be a pre-existing condition based on a sharp protusion on the top of the femur/socket into the hip, and otherwise wouldn't present itself where the individual not say running 50+ mpw in blocks of 12 weeks with increasing intensity
[n=1] here, but I was an adult onset hobbyjogger, and had an inadequate buildup to a full mary [~30 mpw, but reasonable aerobic base, was a sub 2:30 oly tri'er, aka hobby biker+swimmer] so had a reasonable aerobic base [~20 flat 5k, so not good but not 4 hour territory either]
and.... wait for it.....
spent about 12 weeks sidelined after my first and only full mary with a hip issue. My typical running blocks are usually book-ended by injuries [I'm over 40], and I dont think my experience is outside typical. Anything beyond about 15-20 mpw seems to put me on a path to injury. YMMV
This also means its not so much that thon training is the devil---I cant get through mid distance run training un-injured either. Fortunately theres a lot of stuff out there that isn't just running.