Muscle co-contraction measured in vivo during dvj increases tibial anterior force

Muscle and knee forces were estimated for 13 female athletes performing a drop vertical jump (DVJ) to quantify tibial anterior shear force (ASF) during landing. We employed and compared a method that accounted for measured electromyography (EMG) to a more typical effort minimization method to evaluate the impact of in vivo muscle co-activation on ASF.