Every year several of our young athletes at Legacy Pediatrics experience a significant knee injury. A torn anterior cruciate ligament (ACL) can be devastating to the athlete both physically and emotionally. The numbers of ACL injuries in young athletes, especially in teenage girls, is skyrocketing and a great deal of research is underway both to better understand the problem and to find a solution. A new study may help unlock this problem: increasing strength in supporting muscles and changing the warm up routines of young athletes before practices and games could greatly lower the risk of these athletes experiencing an ACL injury.