Pasma Jantsje H, Bijlsma Astrid Y, van der Bij Mark D W, Arendzen J Hans, Meskers Carel G M, Maier Andrea B
Department of Rehabilitation Medicine, Leiden University Medical Center, Leiden, The Netherlands.
Gerontology. 2014;60(4):306-14. doi: 10.1159/000357406. Epub 2014 Mar 7.
Age-related differences in standing balance are not detected by testing the ability to maintain balance. Quality of standing balance might be more sensitive to detect age-related differences.
To study age-related differences in quality of standing balance, center of pressure (CoP) movement was evaluated using a wide range of CoP parameters in several standing conditions in healthy young and old participants.
In 35 healthy young (18-30 years) and 75 healthy old (70-80 years) participants, CoP movement was assessed in eight standing conditions on a force plate, including side-by-side, one-leg, semi-tandem and tandem stance, both with eyes open and eyes closed. Direction-specific CoP composite scores were calculated from standardized single CoP parameters (mean amplitude, amplitude variability, mean velocity, velocity variability and range) in anterior-posterior (AP) and medial-lateral (ML) direction. Linear regression analysis was used to detect age-related differences in single CoP parameters and composite scores - adjusted for gender, height and weight.
Overall, single CoP parameters were higher in old compared to young participants, but no single CoP parameter consistently demonstrated the largest effect size for all standing conditions. Age-related differences were demonstrated for CoP composite scores in AP direction (tandem eyes open; semi-tandem eyes closed; p < 0.001). CoP composite scores in ML direction were consistently higher for all standing conditions in old compared to young participants (p < 0.001).
CoP composite scores in ML direction were the most consistent parameters to detect age-related differences in quality of standing balance in healthy participants and might be of clinical value to detect subtle changes in quality of standing balance.
通过测试维持平衡的能力无法检测出与年龄相关的站立平衡差异。站立平衡质量可能对检测与年龄相关的差异更为敏感。
为研究站立平衡质量与年龄相关的差异，在健康青年和老年参与者的多种站立条件下，使用广泛的压力中心（CoP）参数评估压力中心的运动。
对35名健康青年（18 - 30岁）和75名健康老年（70 - 80岁）参与者，在测力台上的八种站立条件下评估CoP运动，包括双脚并列、单腿、半串联和串联站立姿势，均在睁眼和闭眼状态下。根据前后（AP）和内外侧（ML）方向标准化的单个CoP参数（平均幅度、幅度变异性、平均速度、速度变异性和范围）计算特定方向的CoP综合评分。采用线性回归分析检测单个CoP参数和综合评分与年龄相关的差异，并对性别、身高和体重进行校正。
总体而言，老年参与者的单个CoP参数高于青年参与者，但没有单个CoP参数在所有站立条件下都始终显示出最大效应量。在AP方向的CoP综合评分存在与年龄相关的差异（串联站立睁眼；半串联站立闭眼；p < 0.001）。与青年参与者相比，老年参与者在所有站立条件下ML方向的CoP综合评分始终更高（p < 0.001）。
ML方向的CoP综合评分是检测健康参与者站立平衡质量与年龄相关差异的最一致参数，可能对检测站立平衡质量的细微变化具有临床价值。
