It makes sense when it happens to supreme athletes because they have abnormal masses of muscle that we didn’t evolve to handle on average ligaments. Remember you can grow muscles but can’t grow your achilles, acl, etch. They also extensively strain their joints and body repeatedly. But an ordinary person who isn’t fat and does not have strained ligaments shouldn’t tear his achilles by just running like that. Holy shit we would’ve gone extinct if we were that fragile lmao