The effects of walking speed on obstacle crossing in healthy young and healthy older adults
The effects of walking speed on obstacle crossing in healthy young and healthy older adults
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DOI：
10.1016/j.jbiomech.2003.11.002
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发表时间：
2004-06-01
影响因子：
2.4
通讯作者：
Kuo, CE
中科院分区：
文献类型：
--
作者：
Draganich, LF;Kuo, CE
研究了10名健康青年人（YA）和10名健康老年人（OA）的步行速度和年龄对跨越障碍物前站立时后肢关节产生的峰值外力矩和跨越障碍物时后肢运动学的影响。OA组髋、膝关节内收力矩峰值小于等于0.046，比YA组大21-43%。OA患者从脚趾离地到脚趾越过障碍物的髋关节屈曲角速度比YA患者低20%（p = 0.048）。在两组中，髋、膝或踝关节的8个外部峰值力矩随速度的增加而显著增加（小于或等于0.01）;在矢状面中，膝关节屈曲时的最大值为62%（小于或等于0.0001）。脚趾障碍清除没有受到影响。后足位置受速度影响，但不受年龄影响。速度对膝关节外展-内收的影响很小（约10 °），这是唯一受影响的关节角度（p=0.022）。在OA的后肢中发生的更大幅度的髋关节和踝关节内收力矩对后肢的髋关节和踝关节外展肌提出了更大的要求，以在用前肢跨过障碍物时保持动态平衡。(C)2003 Elsevier Ltd.保留所有权利。
The effects of walking speed and age on the peak external moments generated about the joints of the trailing limb during stance just prior to stepping over an obstacle and on the kinematics of the trailing limb when crossing the obstacle were investigated in 10 healthy young adults (YA) and 10 healthy older adults (OA). The peak hip and knee adduction moments in OA were 21-43% greater than those in YA (pless than or equal to0.046). The angular velocity of hip flexion from toe-off to when the toe was over the obstacle in OA was 20% less than that in YA (p = 0.048). Eight external peak moments about the hip, knee, or ankle increased significantly with speed in both groups (pless than or equal to0.01); the largest in the sagittal plane was 62% for knee flexion (pless than or equal to0.0001). Toe-obstacle clearance was not affected. Trailing foot placement was affected by speed, but not by age. Speed produced a small change (similar to1degrees) in knee abduction-adduction, the only joint angle affected (p=0.022). The greater magnitudes of hip and ankle adduction moments occurring in the trailing limb of OA place larger demands on the hip and ankle abductors of the trailing limb to maintain dynamic balance when stepping over the obstacle with the leading limb. (C) 2003 Elsevier Ltd. All rights reserved.