The sudden deceleration, shifting in the knee, popping sound and screaming from the intense pain that immediately follows is becoming increasingly common among our young athletes. Those who have witnessed or suffered a torn anterior cruciate ligament (ACL) are familiar with the pain, surgery and intense 6 to 8 month rehabilitation that accompanies the injury, not to mention the disappointment of ending a season. Nationwide, this will occur more than 500,000 times this year, and female athletes...