摘要
目的研究重力水平对步态行走时下肢关节运动的影响规律。方法设计一种可随动悬吊式低重力模拟装置用于不同重力水平的模拟,利用运动捕捉系统和三维测力台对12名受试者在正常重力(1 G)、火星重力(1/3 G)及月球重力(1/6 G)下步态行走时下肢关节运动参数进行测量。结果重力水平降低后,髋、膝关节矢状面的活动范围显著减小(P<0.01),踝关节矢状面的活动范围显著增加(P<0.05),1 G重力下髋、膝关节、踝关节矢状面的活动范围分别为45.2°、67.7°、32.5°,1/6 G重力下髋、膝、踝关节矢状面的活动范围分别为25.1°、50.8°、42.4°。低重力环境下,下肢关节在矢状面上的关节力和力矩明显减小(P<0.01)。结论本研究得到的低重力下步态行走规律与以往使用跑步机得到的研究结果大体相同。航天员在地面可以使用跑步机在低重模拟装置的帮助下开展针对性的月面行走训练。
Objective To investigate the influence of gravity levels on lower limb motions during human walking.Methods A suspended microgravity simulation system was designed for the experiment.Kinetic parameters from lower limb joints of twelve volunteers during walking were measured by the motion capture system and 3 D force plate under simulated Mars gravity(1/3 G),lunar gravity(1/6 G)and earth gravity(1 G).Results Under simulatedMars and lunar gravity,the ranges of motion(ROMs)of hip and knee joints in sagittal plane significantly decreased(P<0.01)while the ROMs of ankle joints obviously increased(P<0.05).The ROMs of hip,knee and ankle joints in sagittal plane under earth gravity were 45.2°,67.7°,32.5°,respectively,while the ROMs of hip,knee and ankle joints under lunar gravity were 25.1°,50.8°,42.4°,respectively.In addition,the force and torque of lower limb joints in sagittal plane under lower gravity also decreased significantly(P<0.01).Conclusions The results obtained by this study were almost the same as the research findings obtained by using treadmill.Astronauts can use the treadmill and microgravity simulation system for walking exercises under lunar gravity on the earth.
作者
杨洪瑞
罗诗瑶
尚坤
刘东岳
马加炉
YANG Hongrui;LUO Shiyao;SHANG Kun;LIU Dongyue;MA Jialu(National Key Laboratory of Human Factors Engineering,China Astronauts Research and Training Center,Beijing 100094,China)
出处
《医用生物力学》
EI
CAS
CSCD
北大核心
2020年第1期101-107,共7页
Journal of Medical Biomechanics
基金
载人航天预先研究项目(020301).
关键词
模拟低重力
步态分析
下肢关节
运动学
动力学
simulated reduced gravity
gait analysis
lower limb joints
kinematics
kinetics
