Comparison between the mean (sd) measured EMG activities and model-predicted excitations (EXC) over stance, and the first (swing 1) and second (swing 2) half of swing during the maximum speed (100%) sprinting gait cycle. EMG and excitations (EXC) magnitudes during each phase are expressed as a percentage of the mean activity over the full gait cycle. Stance is the phase between heel contact and toe off, swing 1 is from toe-off to peak knee flexion and swing 2 is from peak knee flexion to heel contact.