Countermovement jump assessment as a substitute for isokinetic strength testing

The purpose of this study was to determine whether a countermovement jump could reliably be used as a substitute or dynamometer strength testing. Eighty-six high school basketball athletes were tested, and results indicate that as countermovement jump peak force, power, and impulse increase, peak concentric quadriceps and hamstring torque at 240°/s and eccentric hamstring torque at 30°/sec increase. In the future, clinicians who do not have access to dynamometers can use the countermovement jump on force plates to determine improvements and/or deficits in lower extremity strength.