happen than it was just before prior to landing, you are at relative increased risk. the second test is to look at the relative strength of the hamstrings and quad ceps. if they're less than 50% as strong, you may be at increased risk. the third test is to look at leg asymmetry. we do an x-hop test, put an x on the floor and hop in the quadrants in all directions, forward, back ward, diagonally. and look at the relative number of touch downs one leg versus the other. if you're one or more deficient in any of those tests, you may be at increased risk. >> last question, more for my wife, she asks about this all the time, are women's knees more at risk than men? >> depending on which articles you read, somewhere between two and ten times more at risk of tearing their acl and