4. Karate
If you thought that sports-based disciplines were the only place where boxer’s fractures occurred then you’re sorely mistaken. They are just as common in karate, but for a few different reasons. First of all, most of the time, karate fighters don’t wear gloves when punching objects. They only put gloves on when sparring with other karatekas. Furthermore, karatekas generally hit harder objects than boxers.
For instance, where a boxer might hit a heavy bag, karatekas will instead hit a wooden board and attempt to shatter it. These board-breaking attempts are often performed in a metacarpal-first manner meaning that the bone at the base of their hand makes the first contact with the object that they’re striking. This subjects their metacarpal to very high amounts of pressure and thus it makes it very likely that they might suffer from a boxer’s fracture. That being said, it’s still more common in bare-knuckle fighting.