手持外部负荷对有无慢性下腰痛的老年人和年轻人站立平衡的影响。
Effects of Holding an External Load on the Standing Balance of Older and Younger Adults With and Without Chronic Low Back Pain.
作者信息
Shigaki Leonardo, Vieira Edgar Ramos, de Oliveira Gil André Wilson, Araújo Cynthia Gobbi Alves, Carmargo Mariana Zingari, Sturion Leandro Amaral, de Oliveira Marcio Roǵerio, da Silva Rubens A
机构信息
Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Londrina, Brazil.
Physical Therapy & Neuroscience Departments, Wertheims' Colleges of Nursing and Health Sciences & Medicine, Florida International University, Miami, FL.
出版信息
J Manipulative Physiol Ther. 2017 May;40(4):284-292. doi: 10.1016/j.jmpt.2017.01.007. Epub 2017 Apr 8.
OBJECTIVE
The purpose of this study was to assess the effect of holding an external load on the standing balance of younger and older adults with and without chronic low back pain (CLBP).
METHODS
Twenty participants with and 20 without CLBP participated in the study. Each group contained 10 younger (50% men) and 10 older adults (50% men). Participants were instructed to look straight ahead while standing on a force platform during two 120-second trials with and without holding an external load (10% of body mass). The center of pressure area, mean velocity, and mean frequency in the anteroposterior and mediolateral directions were measured.
RESULTS
Older adults had worse standing balance than younger adults did (P < .001, d = 0.20). There were no significant balance differences between participants with and without CLBP within age groups during standing balance condition. However, holding the external load significantly increased postural instability for both age groups and CLBP status, with mean effect size across center of pressure variables of d = 0.82 for older participants without CLBP and d = 2.65 for younger participants without CLBP. These effects for people with CLBP were d = 1.65 for subgroup of older and d = 1.60 for subgroup of younger participants.
CONCLUSION
Holding an external load of 10% of body mass increased postural instability of both younger and older adults with and without CLBP.
目的
本研究旨在评估负重对患有和未患有慢性下腰痛（CLBP）的年轻人和老年人站立平衡的影响。
方法
20名患有CLBP的参与者和20名未患有CLBP的参与者参与了本研究。每组包含10名年轻人（50%为男性）和10名老年人（50%为男性）。参与者被要求在力平台上站立时直视前方，进行两次120秒的测试，一次负重（体重的10%），一次不负重。测量前后方向和内外侧方向的压力中心面积、平均速度和平均频率。
结果
老年人的站立平衡比年轻人差（P <.001，d = 0.20）。在站立平衡状态下，各年龄组中患有和未患有CLBP的参与者之间在平衡方面没有显著差异。然而，负重显著增加了两个年龄组和CLBP状态下的姿势不稳定性，对于未患CLBP的老年参与者，压力中心变量的平均效应大小为d = 0.82，对于未患CLBP的年轻参与者，平均效应大小为d = 2.65。对于患有CLBP的人，老年亚组的效应大小为d = 1.65，年轻参与者亚组的效应大小为d = 1.60。
结论
负重10%体重会增加患有和未患有CLBP的年轻人和老年人的姿势不稳定性。
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