Objective

Tracking postural control processes at dynamic conditions might help develop an appropriate rehabilitation program in osteoporotic women. This study aimed to investigate the differences in center of pressure (COP) control at weight shifting and dynamic tasks between postmenopausal women with and without type-I osteoporosis. Also, we investigated the correlations between bone mineral density (BMD), the activity-specific balance confidence questionnaire (ABC-Q) score, and postural control parameters.

Method

A total of 62 volunteer postmenopausal women participated in this study. The participants were classified into non-osteoporotic (NOP, T-score >1, n = 35, age = 60.04± 5.33 years) and osteoporotic (OP, T-score < −2.5, n = 27, age = 61.88 ± 5.34 years) groups. The COP sway was recorded using a Kistler force plate during performance-based Limits of Stability (LOS), Curve Tracking (CT), Sit to Stand (STS), and Turn tasks. In addition, the level of balance confidence in daily activities was evaluated by ABC-Q.

Results

In the LOS task, COP sway velocity in the anterior direction (P = 0.02) and COP maximum excursion in the side-to-side direction (right-side P = 0.027 and left-side P = 0.044) were significantly lower in the OP than the NOP group. In the CT task, all the quantified parameters, including errors and area, showed significantly lower values in the OP group than the NOP group (P < 0.05). In the STS task, the rising index score was significantly higher in the OP group than the NOP group (P = 0.014). The two groups had an equal ABC-Q score (P = 0.175). The COP sway variables correlated significantly with the lumbar and femoral neck T-score (P < 0.05).

Conclusion

BMD decline can change weight shifting and dynamic postural control in postmenopausal women.

中文翻译：

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患有和不患有 I 型骨质疏松症的绝经后妇女的体重转移和动态控制策略是否不同？

客观的

在动态条件下跟踪姿势控制过程可能有助于为骨质疏松症妇女制定适当的康复计划。本研究旨在调查患有和不患有 I 型骨质疏松症的绝经后妇女在体重转移和动态任务中压力中心 (COP) 控制的差异。此外，我们调查了骨矿物质密度 (BMD)、特定活动平衡信心问卷 (ABC-Q) 评分和姿势控制参数之间的相关性。

方法

共有 62 名自愿绝经后妇女参加了这项研究。参与者被分为非骨质疏松症（NOP，T 值 >1，n  = 35，年龄 = 60.04±5.33 岁）和骨质疏松症（OP，T 值 < -2.5，n  = 27，年龄 = 61.88±5.34 岁） ) 组。在基于性能的稳定性极限 (LOS)、曲线跟踪 (CT)、坐到站立 (STS) 和转弯任务期间，使用奇石乐测力台记录 COP 摇摆。此外，ABC-Q 还评估了日常活动中的平衡信心水平。

结果

在 LOS 任务中，前向的 COP 摆动速度（P  = 0.02）和左右方向的 COP 最大偏移（右侧P  = 0.027 和左侧P  = 0.044）在 OP 中显着降低比 NOP 组。在 CT 任务中，OP 组的所有量化参数，包括误差和面积，均显着低于 NOP 组（P  < 0.05）。在 STS 任务中，OP 组上升指数评分显着高于 NOP 组（P  = 0.014）。两组的 ABC-Q 评分相等（P  = 0.175）。COP 摆动变量与腰椎和股骨颈 T 值显着相关（P  < 0.05）。

结论

BMD 下降可以改变绝经后妇女的体重转移和动态姿势控制。