Many common injuries are preventable. Most injuries fall into two categories: traumatic injuries and overuse injuries. 

Traumatic injuries are injuries that occur suddenly like getting hit at the side of the knee in football or getting slide tackled in soccer. Some of these injuries are not avoidable, but the likelihood of them can be reduced through proper strength and conditioning. The stronger the muscles around a joint, the more likely you will be able to protect the joint in adverse situations.