da Silva Rubens A, Vieira Edgar R, Carvalho Carlos E, Oliveira Marcio R, Amorim César F, Neto Elias Nasrala
Laboratory of Functional Evaluation and Human Motor Performance (LAFUP), Center for Health Science Research, Universidade Norte do Paraná (UNOPAR), 675 Paris Av, Londrina, CEP 86041-120, Brazil.
Doctoral and Masters Program in Rehabilitation Sciences UEL/UNOPAR, 675 Paris Av, Londrina, PR, Brazil.
Eur Spine J. 2016 Apr;25(4):1251-7. doi: 10.1007/s00586-015-4255-9. Epub 2015 Oct 1.
The prevalence of chronic low back pain (CLBP) is higher in older than in younger adults and is associated with poor postural control and falls. The objective of this study was to compare the postural control of younger and older subjects with and without CLBP during a one-leg stance.
Twenty subjects with and 20 subjects without nonspecific CLBP participated in the study. Each group contained 10 younger (50% males; mean age: 31 years) and 10 older adults (50% males; mean age 71 years). The subjects performed three 30-s trials of a one-leg stance on a force platform. Balance parameters were computed to quantify postural control, including center of pressure (COP) area, mean velocity, and mean frequency in the anteroposterior and mediolateral directions.
Participants with CLBP presented significantly poorer balance (P < 0.05) than participants without CLBP. The effect size was large for younger adults (d = 1.44) and small for older adults (d = 0.40). Older adults with CLBP presented poorer balance than younger adults with CLBP (large effect size, d = 1.24).
The findings indicate that CLBP affects the balance of both younger and older adults, and that the age-related changes also affect balance and modify the magnitude of CLBP effects on balance.
慢性下腰痛（CLBP）在老年人中的患病率高于年轻人，且与姿势控制不良和跌倒有关。本研究的目的是比较有和没有CLBP的年轻人和老年人在单腿站立时的姿势控制情况。
20名有非特异性CLBP的受试者和20名无CLBP的受试者参与了本研究。每组包含10名年轻人（50%为男性；平均年龄：31岁）和10名老年人（50%为男性；平均年龄71岁）。受试者在测力平台上进行三次30秒的单腿站立试验。计算平衡参数以量化姿势控制，包括压力中心（COP）面积、平均速度以及前后和内外侧方向的平均频率。
患有CLBP的参与者的平衡能力明显比没有CLBP的参与者差（P < 0.05）。年轻人的效应量较大（d = 1.44），老年人的效应量较小（d = 0.40）。患有CLBP的老年人比患有CLBP的年轻人平衡能力更差（效应量较大，d = 1.24）。
研究结果表明，CLBP会影响年轻人和老年人的平衡，并且与年龄相关的变化也会影响平衡，并改变CLBP对平衡影响的程度。
