软式腰托可提升跌倒扰动下的身体平衡稳定性。
Impact of a Soft Wearable Back-Support Device on Postural Stability during Trip-Like Perturbations
- 通过可调刚度的软式腰托增强人体反应性平衡控制。
- 站立时刚度越高，最小稳定裕度（MOS）提升越明显。
- 适用于易跌倒人群，尤其适合个性化调节方案研究。
本研究通过两种实验范式——受扰站立和受扰行走——评估了一种软式可穿戴腰托在应对模拟跌倒扰动时对躯体稳定性的影响。健康受试者在三种不同腰托条件下完成试验：无设备、低刚度佩戴、高刚度激活。全身稳定性通过最大失衡时刻的最小稳定裕度（Minimum Margin of Stability, MOS）进行量化。结果表明，使用腰托后MOS显著增加，说明姿势稳定性提升。站立状态下，随腰托刚度增加，MOS显著提高；而在行走中，两种腰托条件均优于无设备状态，但彼此间无显著差异。这些发现表明，具有可调刚度的软式可穿戴腰托有望改善对外部扰动的反应性平衡控制，对防跌倒具有重要意义。未来研究应探索个性化刚度优化，并在高跌倒风险人群中验证其有效性。
原文摘要 · Abstract (English)
The effectiveness of a soft wearable back-support device in enhancing postural stability was investigated under trip-like perturbations using two experimental paradigms: perturbed standing and perturbed walking. Healthy subjects completed trials under three different back-support conditions: no device, device worn with low stiffness, and device activated with high stiffness. Whole-body stability was quantified using the minimum Margin of Stability (MOS) at the point of maximal instability. Results demonstrated increased MOS during device use, indicating enhanced postural stability. In standing, MOS increased significantly with device stiffness, whereas in walking, both device conditions improved MOS relative to no device but did not differ significantly from each other. These findings highlight the potential of soft wearable back-support devices with adjustable stiffness to improve reactive balance control against external perturbations, with important implications for fall prevention. Future research should explore personalized stiffness optimization and evaluate efficacy in populations at elevated risk of falls.
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