The net muscle torques about the hip and knee joint were positive during almost the entire period, indicating flexor and extensor dominance, respectively. When the angular velocity of the hip was positive there was also a net flexor muscle torque about the hip joint, except at the very end. Torque reversal about the hip joint is a sudden change of sign of the torque, which could not be observed in the present study. The flexor torque just before impact was low and lasted too short a time to influence the dynamics significantly. The peak muscle torque about the hip joint ranged from 217.3 Nm to 320.3 Nm (average 271.3 Nm) and was observed in the period of knee extension. The peak knee muscle torque ranged from 101.0 Nm to 194.6 Nm (average 161.0 Nm) and was observed just before the beginning of the knee extension.