“I remember back when I played sports in high school," Kirsch said. The lack of that downtime is one of several underlying factors that has led to a rise in knee injuries in high school athletes, specifically female athletes. Do you have any areas where you're really, really deficient? … There is some evidence in terms of reducing an ACL injury risk, and it focuses a lot on plyometrics and lower body training. That’s what makes the force plates so vital, as well as places like ETS for athletes coming back from injury.