3 ms·
I suspect there are some differences between the exercise deep-squat, and the sit-squat where, at the end, you're essentially sitting on your heels, with little
by gojomo 7y ago
I suspect there are some differences between the exercise deep-squat, and the sit-squat where, at the end, you're essentially sitting on your heels, with little-to-no ongoing exertion.
Obviously, a basketball action was the key and triggering event. But I'd been playing similar basketball on similar concrete courts for 25 year before the injury, and plenty since. My games aren't that intense. Yet that's the most serious injury I've had. (Others were milder ankle & foot injuries.)
- SketchySeaBeast 7y agoSounds like you just had bad luck, I can't imagine your own body-weight affecting the ACL in any sort of negative fashion. This article rates a full 140 degree unweighted squat - much like you were doing, at 66N, which is 1/5th of just walking, and in the < 2% range of maximum ACL strain. https://www.jospt.org/doi/pdf/10.2519/jospt.2012.3768 https://www.jospt.org/doi/pdf/10.2519/jospt.2012.3768
- clairity 7y agoit's still probably due to basketball, where ACL tears are one of the most common injuries (after ankle sprains of course). many tendon and ligaments can't easily repair themselves (and where they can, it's slow), so the tears accumulate over time. the ACL is absolutely crucial (ha!) to stabilizing the knee (especially front-back motion on the horizontal plane) and keeping it from falling apart (hyperextending along the tibiofemoral axis). (took a dissection class in grad school, where we cut an ACL to see how it affects motion and stability.)