Females are 3-8 times more likely to sustain an ACL tear than males. In addition, over 70 percent of all ACL injuries occur during non-contact activities, such as cutting, jumping and twisting maneuvers. The DonJoy Female Fource addresses biomechanical factors that have been implicated in the high incidence of anterior cruciate ligament (ACL) tears in females. Females tend to perform cutting and landing maneuvers with their knees and hips in an extended and less protected position.