To evaluate the posture at the time of use of the equipment body which performs the passive motion, to obtain the correct posture, and to provide the motion control system which enhances the motor effect by the motion in the correct posture. The motion is exercised using a passive motion device 1 having a swinging seat portion, and the change of the acceleration of the lower back of the user during the motion is measured by the activity meter 6. The acceleration measured by the activity meter 6 is input to the attitude evaluation unit 103 of the center server 101, and the posture during the movement of the user is evaluated from the response pattern which is the time change of the acceleration. The evaluation is displayed on the display device 2 and displayed to the user.
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