Effect of age on center of mass motion during human walking.
Effect of age on center of mass motion during human walking.
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DOI：
10.1016/j.gaitpost.2009.05.006
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发表时间：
2009-08
期刊：
影响因子：
2.4
通讯作者：
Thelen, Darryl G.
中科院分区：
文献类型：
--
作者：
Hernandez, Antonio;Silder, Amy;Heiderscheit, Bryan C.;Thelen, Darryl G.
本研究的目的是调查的影响，年龄和速度的身体质心（COM）运动在步态周期。记录了21名健康青年（21-32岁）和20名健康老年人（66-81岁）以80%、100%和120%的首选速度行走时的全身运动学和地面反应。计算了肢体引起的COM加速度和肢体对COM所做的功。尽管以相似的步态速度行走，但老年人在蹬离期间对COM的积极工作显著减少（p < 0.05），但在站立中期对COM进行了更多的积极工作。因此，老年人诱导较低的三轴COM加速度通过后肢和较高的垂直COM加速度通过领先的肢体在双支撑。老年人也减少了在最后三分之一的双重支持的领先的肢体引起的内外COM加速度。在任何速度下，肢体诱导COM加速度的向前和垂直分量高度相关（p < 0.005），但在双支撑期间与内外侧分量无关。总之，这些结果表明，老年人使用领先的肢体，以弥补减少垂直的支持和工作所做的拖曳肢体。此外，老年人似乎适应他们的步态模式，以减少内外COM加速度。这些发现对于理解老年人行走能力和横向平衡的基础因素是相关的。
The objective of this study was to investigate the effects of age and speed on body center of mass (COM) motion over a gait cycle. Whole body kinematics and ground reactions were recorded for 21 healthy young (21–32 y) and 20 healthy older adults (66–81 y) walking at 80%, 100% and 120% of preferred speed. The limb-induced COM accelerations and the work done on the COM by the limbs were computed. Despite walking with similar gait speeds, older adults did significantly (p < 0.05) less positive work on the COM during push-off but then performed more positive work on the COM during midstance. As a result, older adults induced lower tri-axial COM accelerations via the trailing limb and higher vertical COM acceleration via the leading limb during double support. Older adults also reduced the mediolateral COM acceleration induced by the leading limb during the last third of double support. The forward and vertical components of the limb-induced COM accelerations were highly correlated (p < 0.005) but were not correlated to the mediolateral component during double support, at any speed. Together, these results suggest that older adults use the leading limb to compensate for reduced vertical support and work done by the trailing limb. Further, older adults seem to adapt their gait patterns to reduce mediolateral COM accelerations. These findings are relevant for understanding the factors that underlie walking performance and lateral balance in old age.
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影响因子：
2.4
作者：
Kepple, TM;Siegel, KL;Stanhope, SJ
通讯作者：
Stanhope, SJ
影响因子：
2.4
作者：
Silder, Amy;Heiderscheit, Bryan;Thelen, Darryl G.
通讯作者：
Thelen, Darryl G.
影响因子：
1.8
作者：
CAPPOZZO, A;CATANI, F;LEARDINI, A
通讯作者：
LEARDINI, A
影响因子：
5.5
作者：
Ivanenko, YP;Poppele, RE;Lacquaniti, F
通讯作者：
Lacquaniti, F
影响因子：
2.1
作者：
Gard, SA;Miff, SC;Kuo, AD
通讯作者：
Kuo, AD