Fractures and broken bones are very typical in UFC and MMA fights. Although this isn't an MMA event, I thought the video deserved to be among the worst bone fractures in the history of the sport. If you're thinking about starting to train MMA, I don't think you should worry about breaking your bones. MMA fighters can often break the small bones in their hands by throwing punches and even defending them.
Swinging the leg with the greatest force against a shin resting on the floor is too common to cause a fracture. With that said, let's take a look at some of the worst broken and dislocated appendages in the history of MMA. But it's very unlikely that a neck could be fractured by a crank, since it would take more than a thousand pounds of torsional force to impact the bones in the neck.
Mixed martialarts training can include a variety of punches, kicks, limb blocks and throws, and because of this, there is a high chance of a bone breaking.
It usually occurs when a fighter feels a kick in the lower leg and hits his own shin bone against his opponents. Needless to say, this is by far the worst arm break in MMA history, and with the implosion of Brian Jones Jr's leg, it's considered one of the worst bone fractures in sports history. While it's not illegal for wrestlers to unintentionally break a bone during submission attempts, they must give their opponent enough time to “take advantage” of it as an attempt at legal submission.