Each subject began his or her gait cycle in the stance phase, continued through the swing phase and ended in the stance phase. The gait cycle was measured from right heelstrike to right heelstrike. The total gait cycle for both subjects was 0.83 seconds with the stance phase occupying 40% of the total time and swing phase occupying 60%. Both subjects were in the stance phase from 0 to .26 seconds and from .76 to .83 seconds and in swing phase from .26 to .76 seconds.
The subjects ran at a speed of 6.8 km/hr on a treadmill. We analyzed the running motion from the posterior view since we were interested in the foot placement of each subject due to hip adduction or abduction. The stick figure plots show the range of motion of the subjects as well as a general idea of their differing hip angles.
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Figure 2. Running motion of a male subject (left) and a female subject (right). The figures show the lower leg, upper leg and pelvic segments from the rear view. The reference markers were placed on either side of the frame of the treadmill and were located .762 meters apart. The direction of the running motion is in the sagittal plane as simulated by the treadmill. The direction of motion is therefore indicated as forward motion even though no actual forward motion of the body is occurring. | |
