Aging and partial body weight support affects gait variability.
Aging and partial body weight support affects gait variability.
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DOI：
10.1186/1743-0003-5-22
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发表时间：
2008-09-19
影响因子：
5.1
通讯作者：
Stergiou N
中科院分区：
文献类型：
--
作者：
Kyvelidou A;Kurz MJ;Ehlers JL;Stergiou N
衰老导致步态变异性增加，这可能解释了老年人跌倒发生率高的原因。体重支持训练可用于改善老年人的步态并尽量减少跌倒。然而，在开始康复方案之前，需要进行基线研究来确定体重支持对老年人步态变异性的影响。我们的目的是确定年轻和老年健康女性在行走过程中体重支撑水平变化时下肢的运动学变异性。十名年轻女性和十名老年女性在体重支持 (BWS) 系统的跑步机上在四种不同条件下行走两分钟：1 克、0.9 克、0.8 克和 0.7 克。使用 Peak Performance 高速视频系统以 60 Hz 捕获三维运动学。使用线性（幅度；标准偏差和变异系数）和非线性（结构；Lyapunov 指数）测量来分析右下肢矢状面角运动学变异的幅度和结构。使用双向混合方差分析来评估年龄和 BWS 对变异性的影响。线性分析表明，老年人的髋关节和膝关节的变异性明显高于年轻女性。此外，BWS 水平越高，所有关节的变异性就越大，正如所使用的线性和非线性测量中所发现的那样。 BWS 水平增加会增加下肢运动变异性。如果 BWS 训练的目的是减少步态模式的变异性，那么根据我们的结果，这并没有发生。但是，我们没有进行培训研究。因此，经过几周的训练和习惯增加后，这些初始增加的变异性值可能会减少。这一假设需要在未来对“健康”老年人和老年跌倒者的调查中得到解决。此外，BWS 训练有可能通过将地面运动变异性提高到健康的规范水平来产生积极的转移效应，这也需要在未来的研究中进行探索。
Aging leads to increases in gait variability which may explain the large incidence of falls in the elderly. Body weight support training may be utilized to improve gait in the elderly and minimize falls. However, before initiating rehabilitation protocols, baseline studies are needed to identify the effect of body weight support on elderly gait variability. Our purpose was to determine the kinematic variability of the lower extremities in young and elderly healthy females at changing levels of body weight support during walking. Ten young and ten elderly females walked on a treadmill for two minutes with a body weight support (BWS) system under four different conditions: 1 g, 0.9 g, 0.8 g, and 0.7 g. Three-dimensional kinematics was captured at 60 Hz with a Peak Performance high speed video system. Magnitude and structure of variability of the sagittal plane angular kinematics of the right lower extremity was analyzed using both linear (magnitude; standard deviations and coefficient of variations) and nonlinear (structure; Lyapunov exponents) measures. A two way mixed ANOVA was used to evaluate the effect of age and BWS on variability. Linear analysis showed that the elderly presented significantly more variability at the hip and knee joint than the young females. Moreover, higher levels of BWS presented increased variability at all joints as found in both the linear and nonlinear measures utilized. Increased levels of BWS increased lower extremity kinematic variability. If the intent of BWS training is to decrease variability in gait patterns, this did not occur based on our results. However, we did not perform a training study. Thus, it is possible that after several weeks of training and increased habituation, these initial increased variability values will decrease. This assumption needs to be addressed in future investigation with both "healthy" elderly and elderly fallers. In addition, it is possible that BWS training can have a positive transfer effect by bringing overground kinematic variability to healthy normative levels, which also needs to be explored in future studies.
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影响因子：
8.3
作者：
HESSE, S;BERTELT, C;MAURITZ, KH
通讯作者：
MAURITZ, KH
影响因子：
--
作者：
Harkema, Susan J.
通讯作者：
Harkema, Susan J.
影响因子：
3.2
作者：
FINCH, L;BARBEAU, H;ARSENAULT, B
通讯作者：
ARSENAULT, B
影响因子：
3.2
作者：
Behmran, AL;Harkema, SJ
通讯作者：
Harkema, SJ
影响因子：
4.3
作者：
Field-Fote, EC
通讯作者：
Field-Fote, EC