Athletic Lab’s mikeyoungphd talks about how and why he uses the RSI test to assess leg stiffness and readiness in speed and power athletes. In this short video excerpt you’ll see some insane RSI values and an impromptu backflip from NFL standout thenyny7. See the full video on our YouTube and Facebook channels. Athletic Lab offers training opportunities for elite Track & Field and Football 🏈 athletes. If you’re interested in getting faster and more powerful contact us today. #nfl #trackandfield #strengthandconditioning #iloveal #cary #athleticlab #sportsperformance #plyometrics #sportsscience #smartjump #fusionsport