ENERGY ANALYSIS OF DIFFERENT TRUNK TILTING ANGLES ON JOINT LOADING DURING FALL ON AN OUTSTRETCHED HAND

Authors:
  • PCPei-Hsi Chou
    Pei-Hsi Chou
  • YCYou-Li Chou
    You-Li Chou
  • MCMING-CHANG TSAIMechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, TaiwanPEI-HSI CHOUDepartment of Orthopedic Surgery, Kaohsiung Medical University, Kaohsiung, TaiwanYOU-LI CHOUCenter of General Education, Chang Jung Chri
    MING-CHANG TSAIMechanical Engineering, National Kaohsiung University of Applied Sciences, Kaohsiung, TaiwanPEI-HSI CHOUDepartment of Orthopedic Surgery, Kaohsiung Medical University, Kaohsiung, TaiwanYOU-LI CHOUCenter of General Education, Chang Jung Chri
  • KLKan Luo
    Kan Luo
  • JLJianqing Li
    Jianqing Li
  • JWJianfeng Wu
    Jianfeng Wu
  • HYHua Yang
    Hua Yang
  • GXGaozhi Xu
    Gaozhi Xu
  • SLShu-Zon Lou
    Shu-Zon Lou
  • HCHsin-Chieh Chen
    Hsin-Chieh Chen
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Abstract
From previous researches, studies on the forward fall had focused on the relationship between the joint loading and position of the forearm and elbow. Previous studies also stressed the importance of energy absorption by the shoulder and elbow during the forward fall. However, the effects of different tilting angles on joint loading of the upper extremity had not been presented. This study investigated the effects of different tilting angles on joint loading of the upper extremity during fall on an outstretched hand. The absorbed energy at Ts, T1, T2 and Te were analyzed. Ten healthy young males were selected in this study. Subjects were adjusted to different trunk tilting angles of 0°, 10°, 20° and 30°with a custom-made suspension system with an outstretched hand of 5 cm height above the ground. The expert vision motion system with 6 CCD cameras and one force plate were used to collect kinetics and kinematics data. The results showed that shoulder would absorb the most impact energy and followed by wrist and elbow. The time period at T2 to Te absorbed more energy in every joint.

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