It ain't just the weight. Military jump situations are seldom optimized for joint safely - jumping at night, landing on rough terrain, etc. And neither military culture nor hostile defending forces encourage a "if you think you might have injured a joint, then remain in place and signal for medical attention..." approach.
(My cousin served from the later 70's to early 10's, mostly in the 5th Special Forces Group. Plenty of action, but rather tight lipped on details - as he should be.)
It ain't just the weight. Military jump situations are seldom optimized for joint safely - jumping at night, landing on rough terrain, etc. And neither military culture nor hostile defending forces encourage a "if you think you might have injured a joint, then remain in place and signal for medical attention..." approach.
(My cousin served from the later 70's to early 10's, mostly in the 5th Special Forces Group. Plenty of action, but rather tight lipped on details - as he should be.)