-In the United States, 20,000 to 80,000 high school female athletes experience ACL injuries each year, with most in soccer and basketball.
-Straight-ahead sports like jogging, swimming, and biking place little stress on the ACL. Sports such as soccer, basketball and volleyball that involve cutting, planting and changing direction, in which the ACL plays a vital role, put athletes, particularly females, at greatest risk of ACL injury.'
-Less than a third of all reported ACL injuries involve contact from an outside force such as an opposing player. 

One-step/stop deceleration

Cutting movements

Sudden change in direction

Landing from a jump with inadequate knee and hip flexion (at or near full extension)

Lapse of concentration (resulting from unanticipated change in the direction of the play)

-Overall, girls are 8 times more likely to suffer an ACL injury than boys.


video to help prevent ACL tears. 

Read more:  http://www.momsteam.com/health-safety/muscles-joints-bones/knee/acl-injuries-in-female-athletes#ixzz45pXcenS1