학생용 가방의 무게 중심 위치 변화에 따른 척추 하중 분포 분석

In this paper, we measured the posture change in gait and compared the vertebral loading according to the position of center of gravity of backpack. We measured the gait posture of randomly chosen 67 elementary schoolchildren with backpacks by motion capture system and still cameras. As the result of the ANOVA test of the posture changes, we found that the back angle tends to reduce and the neck angle is increased accordingly when the backpack has upper center of gravity. After the experiment, we developed muscular skeletal human model including the backpacks using ADAMS/LifeMOD™. By changing the position of the center of the gravity of the backpack and the angles of neck and back, we conclude that the backpack of which center of gravity is positioned upper and closer to spine has advantage to maintain the straight posture during the gait and to reduce the vertebral torque.