If you play impact sports, your knees are at risk. Proper stretching, strength training and warming up can help mitigate that risk. The American Academy of Orthopaedic Surgeons reports that women are more likely than men to suffer ACL injuries. In fact, a female soccer player is four times more likely than a male soccer player to tear their ACL. This is likely due to how a female�s hips distribute weight on the knees. For this reason, female athletes should take extra care and use strategic weight lifting to strengthen muscles and stabilize the knees.