^I'm siding with OMM on this one. It defies both logic and experience to say that all players are equally injury-prone.
Respectfully, I disagree. Logically, it does not necessarily follow that the existence of a range of bone densities (or a range in any determinant of fitness) must result in a range of football-related bone injuries. The curve may be leptokurtic. If bone-density variation is small relative to the size of the forces encountered in football (and I suspect that it is), then we shouldn't expect to detect bone-related injury-proneness among football players. Another way: it may well be the case that the typical bone-breaking hit exerts force so far in excess of human tolerances that athletes on both sides of the bone-density spectrum would experience a break. Other factors, like angle-of-impact, repetition of trauma, and use of padding would be so much more relevant as determinants of breakage that physical attributes just don't account for detectable variation.
As for experience, this is a situation that's ripe for bias. Injury-proneness is an entirely post hoc classification. And injuries are memorable events. We're going to be very susceptible to remembering the hits and forgetting the misses in analyzing whether the concept of injury-proneness reflects reality.
Some provisos:
- I don't mean to say that there is no such thing as variation in injuries. Certainly, speedsters pull hamstrings more often than plodders. And there
are injuries that are related to lack of muscle mass (especially those based on repeated trauma) and quality of connective tissue. The latter, though, tend to manifest as chronic injuries and Amir hasn't shown any signs of either.
- I also don't mean to give the impression that I think my surface analysis is conclusive. It's very superficial, and there's good evidence to be had on the other side, too. But, on balance, I just don't see the case for injury-proneness (in football) being supported by the evidence yet. I'm open to changing that opinion should the data conflict with my view.