Department of Applied Physiology and Kinesiology, Center for Exercise Science, University of Florida, Gainesville, FL 32611-8205, USA.
Med Sci Sports Exerc. 2011 Dec;43(12):2352-8. doi: 10.1249/MSS.0b013e318222bc82.
Older adults and individuals with Parkinson's disease exhibit impaired gait initiation performance with less effective anticipatory postural adjustments (APA) and less dynamic stepping characteristics. These observations may reflect impaired interactions between the postural and locomotor components of this task. The purpose of this study was to evaluate the effectiveness of altering the stance position of the initial swing limb on improving APA characteristics and stepping performance.
Three groups (healthy young adults, individuals with Parkinson's disease, and age-matched older adults) of 12 participants initiated gait from three initial stance conditions: normal, backward displaced swing limb, and forward displaced swing limb. Ground reaction forces and whole body kinematics were recorded to characterize the APA and step parameters.
Initiating gait from the back condition produced more forceful weight shifting (P < 0.001), greater propulsive forces (P < 0.001), and faster center-of-mass velocities throughout the stepping phases (P < 0.05).
Translating the swing limb 0.5-ft-length backward seems to enhance the interaction between posture and locomotion, which may have therapeutic potential for improving gait initiation performance.
老年人和帕金森病患者在步态起始时表现出运动启动能力受损，姿势性预备性调整（APA）不充分，且步动态特征较差。这些观察结果可能反映了该任务的姿势和运动成分之间相互作用受损。本研究旨在评估改变初始摆动腿的站位对改善 APA 特征和迈步性能的效果。
三个组（健康的年轻成年人、帕金森病患者和年龄匹配的老年人）的 12 名参与者从三种初始站位条件开始进行步态启动：正常站位、向后摆动腿站位和向前摆动腿站位。记录地面反作用力和全身运动学数据，以描述 APA 和步参数。
从后倾站位开始步态启动会产生更有力的体重转移（P < 0.001）、更大的推进力（P < 0.001）以及在整个迈步阶段更快的质心速度（P < 0.05）。
将摆动腿向后平移 0.5 英尺似乎增强了姿势和运动之间的相互作用，这可能具有改善步态起始性能的治疗潜力。
