高龄和帕金森病对关节水平运动适应快速步行速度的影响

D. Kuhman, Jutaluk Kongsuk, W. Reed, N. Rosenblatt, Kristina M. Visscher, H. Walker, C. Hurt
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引用次数: 0

摘要

行走时,机械输出从踝关节到髋关节的再分配随着年龄的增长而发生。跨越踝关节的组织变化可能会限制关节执行快速行走所需的机械功能,老年人可能会重新分配近端工作来补偿。患有帕金森病(PD)的老年人不表现出远端到近端再分布,因此可能限制了快速行走速度。我们测试了是否随着行走速度的增加,在不考虑PD存在的情况下,高龄患者会限制踝关节运动能力的增强。我们还测试了健康的老年人(不包括PD患者)是否会以更快的速度不成比例地进行更大的机械再分配来补偿踝关节运动样行为的减少。16名年轻人、16名老年人和8名pd诊断的成年人在跑步机上以0.8、1.2和1.6 ms−1的速度行走。我们使用关节功能索引来量化踝关节的运动行为,并使用髋关节-踝关节的机械功比来量化机械再分配。我们发现,在踝关节运动样行为方面,组与速度之间存在显著的交互作用(p < 0.05),随着步行速度的增加,年轻人的运动指数比老年人和PD组增加得更多。与我们的第二个假设相反,我们发现速度对再分配比率有显著的主要影响(p < 0.001),这表明所有三组都随着步行速度的增加而降低再分配比率,但没有显著的相互作用。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of Advanced Age and Parkinson’s Disease on Joint-Level Kinetic Adaptations to Faster Walking Speeds
Redistribution of mechanical output from the ankle to the hip during walking occurs with advanced age. Changes to tissues spanning the ankle may limit the joint from performing mechanical functions necessary to walk at fast speeds and older adults may redistribute work proximally to compensate. Older adults with Parkinson’s disease (PD) do not exhibit the distal-to-proximal redistribution and may therefore be limited in reaching fast walking speeds. We tested whether advanced aging, regardless of the presence of PD, limits the ability to increase motor-like behavior of the ankle as walking speed increases. We also tested whether healthy older adults—but not PD patients—would compensate for reduced motor-like behavior at the ankle with disproportionately larger mechanical redistributions at faster speeds. The 16 young, 16 older, and 8 PD-diagnosed adults walked at 0.8, 1.2, and 1.6 ms−1 on a treadmill. We used joint functional indexing to quantify motor-like behavior of the ankle and a hip-to-ankle mechanical work ratio to quantify mechanical redistribution. We found a significant group x speed interaction (p < 0.05) for motor-like behavior of the ankle, with younger adults increasing motor index more than the older and PD groups as walking speed increased. Contrary to our second hypothesis, we found a significant main effect of speed (p < 0.001) on redistribution ratios, indicating that all three groups decreased redistribution ratios as walking speed increased, but not a significant interaction.
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