Figure 2.

Joint moment profiles during four STS movements. The joint moments and the inertial and static components of the joint moment during four representative movements (movement times: 1.0, 2.0, 4.0 and 7.0 seconds) are shown. Zero seconds is the start time. The solid arrows below the stick figures indicate when seat off occurred (0.44, 0.88, 1.76 and 3.07 seconds) for each of the movements. Dashed arrows indicate when the standing posture was achieved. Joint moments during the sitting phase are not shown, since only the rising phase was analyzed. Circle plots indicate the results at the seat-off time. In the case of the slow movements (movement time: 4.0 and 7.0 seconds), the inertial components of joint moments were always nearly zero. In other words, the total of joint moment closely corresponded to the static component of the joint moment.