Lower-Extremity Force Decrements Identify Early Mobility Decline Among Community-Dwelling Older Adults
Lower-Extremity Force Decrements Identify Early Mobility Decline Among Community-Dwelling Older Adults
复制标题
DOI：
10.2522/ptj.20110239
复制
发表时间：
2012-09-01
期刊：
影响因子：
3.2
通讯作者：
Ploutz-Snyder, Lori L.
中科院分区：
文献类型：
--
作者：
Marko, Moshe;Neville, Christopher G.;Ploutz-Snyder, Lori L.
背景许多明显独立的老年人修改日常任务。任务修改强烈预测未来的移动能力障碍。临床直观，易于测量的“生物标志物”与任务修改将提供可量化的治疗目标，以预防与年龄相关的功能限制。该研究的目的是检查下肢肌肉力量不足和功能相关的截断点与日常任务的修改在社区居住的老年人独立生活。设计。这是一项横断面观察性研究。53名参与者（平均年龄=76.4岁，SD=5.2）进行了任务修改和腿部力量测试。使用先前描述的工具（总结任务修改评分）评估任务修改。26名参与者被归类为任务修改器（TM组），27名参与者被归类为非任务修改器（NTM组）。通过将髋伸肌、膝伸肌和踝跖屈肌的标准化等长和等速扭矩相加，计算矢状面中的净反重力腿部力（NETforce）。与NTM组相比，TM组的下肢等长和等速NET力分别降低了30.0%和33.5%。任务修改的等距和等速NETFforce截止点为
Background. Many apparently independent older adults modify daily tasks. Task modifications strongly predict future mobility disability. Clinically intuitive, easily measured "biomarkers" associated with task modifications would offer quantifiable treatment targets for prevention of age-related functional limitations.Objective. The objective of the study was to examine lower-extremity muscle strength deficits and functionally relevant cutoff points associated with daily task modifications in community dwelling older adults living independently.Design. This was a cross-sectional observational study.Methods. Fifty-three participants (mean age=76.4 years, SD=5.2) were tested for task modifications and leg strength. Task modifications were assessed using a previously described tool (summary task modification score). Twenty-six of the participants were classified as task modifiers (TM group), and 27 participants were classified as non-task modifiers (NTM group). A net antigravity leg force in the sagittal plane (NETforce) was calculated by summing the normalized isometric and isokinetic torques from the hip extensors, knee extensors, and ankle plantar flexors.Results. Compared with the NTM group, the TM group exhibited 30.0% and 33.5% reduction in lower-extremity isometric and isokinetic NETforces, respectively. Isometric and isokinetic NETforce cutoff points for task modifications were