ObjectiveThe aim of this study was to cross-sectionally investigate how static balance changes throughout the aging process in older women aged from their early sixties to their late eighties.MethodsForty-six older women (aged 62–89 years) were requested to stand barefoot and quietly on a force platform for 30 s with their eyes either open or closed. During the trials, the position of the center of foot pressure (CoP) and the acceleration of the body’s center of mass (ACC) were measured. The root mean square (RMS) of the CoP and ACC values was calculated to evaluate the amplitude of postural sway and the level of regulatory activity, respectively. The mean power frequency of the ACC was also calculated to represent the temporal characteristics of regulatory activity.ResultsIn the anterior–posterior direction, there was no significant relationship between the RMS of CoP and the participants’ age, whereas the RMS of ACC significantly increased with increasing age. In the mediolateral direction, however, the RMS of CoP significantly increased with increasing age, whereas the RMS of ACC did not change with age. The mean power frequency of ACC did not exhibit any age-related change in either the anterior–posterior or the mediolateral direction.ConclusionThe results indicate that static balance in older women aged in their early sixties to their late eighties exhibits distinctly contrasting aging patterns between the anterior–posterior and mediolateral directions. To prevent falls in older women, it is necessary to elucidate the physiological mechanisms responsible for the increase in mediolateral sway that occurs throughout old age.

中文翻译：

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六十岁出头至八十岁晚期老年女性静态平衡的年龄相关变化：前后和内侧方向的不同衰老模式

目的本研究的目的是横断面调查60岁出头至80岁后期老年女性在整个衰老过程中静态平衡的变化情况。方法要求46名老年女性（年龄62-89岁）赤脚站立，睁眼或闭眼，安静地在力台上保持 30 秒。在试验期间，测量了足部压力中心（CoP）的位置和身体质心的加速度（ACC）。计算 CoP 和 ACC 值的均方根 (RMS)，以分别评估姿势摇摆的幅度和调节活动的水平。还计算了 ACC 的平均功率频率，以代表调节活动的时间特征。结果在前后方向上，CoP 的 RMS 与参与者的年龄之间没有显着关系，而 ACC 的 RMS 随参与者年龄的增加而显着增加。年龄增加。然而，在内外侧方向，CoP 的 RMS 随着年龄的增长而显着增加，而 ACC 的 RMS 不随年龄的增长而变化。 ACC 的平均功率频率在前后方向或中外侧方向上均未表现出任何与年龄相关的变化。结论结果表明，60 岁出头至 80 岁末的老年女性的静态平衡表现出与年龄组之间明显对比的衰老模式。前后方向和内侧方向。为了防止老年女性跌倒，有必要阐明导致老年时期内侧摇摆增加的生理机制。