Age and stepping limb performance differences during a single-step recovery from a forward fall
Age and stepping limb performance differences during a single-step recovery from a forward fall
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DOI：
10.1093/gerona/60.4.481
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发表时间：
2005-04-01
影响因子：
5.1
通讯作者：
Lloyd, EM
中科院分区：
文献类型：
--
作者：
Madigan, ML;Lloyd, EM
背景本研究的目的是双重的：1）评估任何年龄相关的差异，在一个单一的步骤从一个向前跌倒的恢复过程中，步进肢体的峰值关节速度，和2）以确定是否有能力恢复一个单一的步骤前向前跌倒时，与优势或非优势下肢（LL）步进不同。10名年轻人（19-23岁）和10名老年人（65-83岁）从前倾位置释放，并试图用一步恢复平衡。倾斜幅度增加，直到男人们无法用一步恢复平衡。这些人进行了两次实验，一次是用优势LL行走，一次是用非优势LL行走，以确定从向前跌倒中恢复的能力是否依赖于肢体。在单步回收过程中的峰值关节速度进行了测定。没有年龄相关的差异，在峰值关节速度被发现在恢复过程中从小的倾斜幅度，但老年男性表现出较慢的速度在恢复过程中从最大倾斜幅度。有没有差异，在最大倾斜幅度达到的男子时，加强与优势或非优势LL。结论。先前报道的与年龄相关的步进速度降低似乎是由于最大髋关节屈曲速度、膝关节屈曲和伸展速度以及踝关节跖屈速度的局部降低。此外，年轻人和老年人从向前跌倒中一步恢复的能力似乎并不依赖于肢体。
Background. The purpose of this study was two-fold: 1) to evaluate any age-related differences in peak joint velocities of the stepping limb during single-step recovery from a forward fall, and 2) to determine if the ability to recover front a forward fall with a single step differs when stepping with the dominant or nondominant lower limb (LL).Methods. Ten young (19-23 years old) and ten older (65-83 years old) men were released from forward-leaning positions and attempted to recover their balance with a single step. Lean magnitude was increased until the men failed to recover their balance with a single step. The men performed the experiment twice, once while stepping with the dominant LL and once while stepping with the nondominant LL, to determine if the ability to recover from a forward fall is limb dependent. Peak joint velocities during single-step recoveries were determined.Results. No age-related differences in peak joint velocities were found during recovery from small lean magnitudes, but older men exhibited slower velocities during recovery from maximum lean magnitudes. There was no difference in the maximum lean magnitude achieved by the men when stepping with the dominant or nondominant LL.Conclusions. The previously reported age-related reduction in stepping speed seems to be due to localized reductions in maximum hip flexion velocity, knee flexion and extension velocity, and ankle plantar flexion velocity. Also, the ability of young and older men to recover from a forward fall with a single step does not seem to be limb dependent.