A kinematic analysis of the rapid step test in balance-impaired and unimpaired older women.
A kinematic analysis of the rapid step test in balance-impaired and unimpaired older women.
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对平衡受损和未受损的老年女性进行快速步进测试的运动学分析。
DOI：
10.1016/j.gaitpost.2006.06.001
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发表时间：
2007
期刊：
影响因子：
2.4
通讯作者：
Alexander,NeilB
中科院分区：
文献类型：
--
作者：
Schulz,BrianW;Ashton-Miller,JamesA;Alexander,NeilB
人们对运动学和动力学决定因素知之甚少，而这些决定因素可能解释意志踏步性能测试结果中年龄和平衡障碍的变化。用最大单足站立时间（UST）区分平衡受损老年人（BI，UST<10s，N=15，平均年龄=76岁）和未受损老年人（O，UST>30s，N=12，平均年龄=71岁），然后对他们和健康年轻女性（Y，UST>30s，N=13，平均年龄=23岁）进行快速台阶试验。该测试评估了响应口头命令而自愿采取至少80%最大步长的前、侧和后步骤所需的时间。运动学和动力学数据记录期间，ESTA。结果表明，启动阶段的步骤是年龄和平衡障碍相关的延迟的主要来源。BI延迟主要是由开始踏步前增加的姿势调整引起的，如通过压力中心（COP）路径长度测量的（p<0.003）。步骤着陆阶段显示出类似的，但不显着的时间趋势。踏出着陆过程中的步长和峰值质心（COM）减速度在O中分别下降了18%（p=0.0002）和24%（p=0.001），在BI中分别下降了12%（p=0.04）和18%（p=0.08）。我们得出结论，BI步骤启动延迟是由于步骤启动前他们的姿势调整增加。
Little is known about the kinematic and kinetic determinants that might explain age and balance-impairment alterations in the results of volitional stepping performance tests. Maximal unipedal stance time (UST) was used to distinguish “balance-impaired” old (BI, UST<10s, N=15, mean age=76 years) from unimpaired old (O, UST>30s, N=12, mean age=71 years) before they and healthy young females (Y, UST>30s, N=13, mean age=23 years) performed the rapid step test (RST). The RST evaluates the time required to take volitional front, side, and back steps of at least 80% maximum step length in response to verbal commands. Kinematic and kinetic data were recorded during the RST. The results indicate that the initiation phase of the step was the major source of age- and balance impairment-related delays. The delays in BI were primarily caused by increased postural adjustments prior to step initiation, as measured by center-of-pressure (COP) path length (p<0.003). The Step landing phase showed similar, but non-significant, temporal trends. Step length and peak center-of-mass (COM) deceleration during the Step-Out landing decreased in O by 18% (p=0.0002) and 24% (p=0.001), respectively, and a further 12% (p=0.04) and 18% (p=0.08) in BI. We conclude that the delay in BI step initiation was due to the increase in their postural adjustments prior to step initiation.
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影响因子：
2.4
作者：
Runge, CF;Shupert, CL;Zajac, FE
通讯作者：
Zajac, FE
DOI：
10.1093/gerona/56.10.m627
发表时间：
2001-10-01
影响因子：
5.1
作者：
Lord, SR;Fitzpatrick, RC
通讯作者：
Fitzpatrick, RC
非肌肉扭矩如何影响支撑表面平移后的姿势恢复动力学？
影响因子：
2.4
作者：
Bothner,KE;Jensen,JL
通讯作者：
Jensen,JL
影响因子：
2.4
作者：
Brian W. Schulz;J. Ashton-Miller;N. Alexander
通讯作者：
Brian W. Schulz;J. Ashton-Miller;N. Alexander
影响因子：
1.8
作者：
PATLA, AE;FRANK, JS;PRASAD, S
通讯作者：
PRASAD, S