The changes of average (SD) joint torques and angular velocities of the hip, knee, and ankle are presented in Figures 3, 4, and 5, respectively. The peak magnitudes are summarized in Table 4. The general patterns of the hip flexion, hip adduction, and knee extension torques and angular velocities were similar in both kicks. Among the joint torques, the hip flexion torque was the largest in both kicks and their magnitudes were comparable between the two kicks (see Figure 3 and Table 4). In both kicks, the peak
magnitude of the hip flexion torque occurred during the leg-cocking phase and the hip flexion angular velocity rapidly increased during the leg-cocking phase and reached similar peak magnitudes, after which the angular velocity was decreased until ball impact.