Background

Alterations in bioimpedance parameters and postural control occur with aging and contribute to the increased risk of falls. The aim of this study was to evaluate the balance behavior in relation to bioimpedance and functionality.

Methods

We evaluated 21 elderly (men: 77.3 ± 9.5 years; women: 74.2 ± 9.6 years). The balance in standing posture was measured by the movement of the pressure center in seven positions. Bioimpedance was defined by its parameters resistance, reactance and phase angle, and functionality through the Timed Up and Go Test and Short Physical Performance Battery.

Findings

In the analysis of the mediolateral velocity at the positions feet separated with open and closed eyes, feet together with eyes closed and semi-tandem with eyes open on the platform, an inverse correlation between balance and bioimpedance variables were verified for all models, with a coefficient of determination varying between 20% and 74%. Inverse and significant correlations between reactance and phase angle in the one-legged-support position were verified, in all adjustment models, with coefficient of determination varying between 62% and 91%. In the analysis of mediolateral velocity for the semi-tandem eyes closed position, positive correlation with TUG and an inverse correlation with bioimpedance parameters and pennation angle were observed, with coefficient of determination varying between 21% and 67%.

Interpretation

The postural control is linearly related to bioimpedance parameters and functionality in the elderly. The assessment of balance can provide important information and furnishes useful insights for prevention and treatment strategies in elderly.

中文翻译：

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老年人的体位控制是否与生物电学参数和功能相关？

背景

生物阻抗参数和姿势控制的改变会随着年龄的增长而发生，并导致跌倒的风险增加。这项研究的目的是评估与生物阻抗和功能相关的平衡行为。

方法

我们评估了21位老年人（男性：77.3±9.5岁；女性：74.2±9.6岁）。通过压力中心在七个位置上的移动来测量站立姿势的平衡。生物阻抗由其参数电阻，电抗和相角以及通过定时启动测试和短物理性能电池的功能来定义。

发现

在分析睁开和闭合的眼睛分开的脚，闭着眼睛的双脚并在平台上睁开的眼睛的半串联的位置的中外侧速度时，对所有模型的平衡和生物阻抗变量之间的反相关进行了验证，其中确定系数介于20％和74％之间。在所有调节模型中，均验证了单腿支撑位置中电抗和相角之间的反比和显着相关性，确定系数在62％和91％之间变化。在半串联眼闭合位置的中外侧速度分析中，观察到与TUG呈正相关，与生物阻抗参数和垂度角呈反相关，测定系数介于21％和67％之间。

解释

姿势控制与老年人的生物阻抗参数和功能线性相关。平衡评估可提供重要信息，并为老年人的预防和治疗策略提供有用的见识。