Perturbation-based balance training (PBT) improves reactive stepping in older adults and people with neurological disorders. Slip-induced falls are a threat to older adults, leading to hip fractures. Fall-prone individuals must be trained to regain balance during a fall in the posterolateral direction. This study aims to analyze the characteristics of the reactive step induced by a laterally inclined platform. This cross-sectional study included 46 healthy participants who performed a “lean and release” backward fall using a platform with two inclined angles on each side. Kinovea software was used to analyze the step width. Reactive steps, characterized by crossover or medial foot placement, are preventive measures against posterolateral falls. The first objective was on the narrowed step width that was subjected to analysis using analysis of variance (ANOVA) and Tukey’s post hoc assessment, indicating a tendency toward posterolateral falls. As part of our second objective, the inclined platform resulted in uneven loading between the legs, with a preference for the unloaded leg as the reactive leg (), as determined by Fisher’s exact test and Cramer’s V. These characteristics align closely with those observed in modified constraint-induced movement therapy (mCIMT). The angled platform had a significant effect on selecting the reactive leg, particularly at higher angles (). Thus, the study suggested that the device is capable of inducing posterolateral falls and exhibited mCIMT characteristics.

中文翻译：

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横向倾斜平台上扰动响应的跌落方向和下肢载荷的横截面研究

基于扰动的平衡训练 (PBT) 可改善老年人和神经系统疾病患者的反应性迈步。滑倒引起的跌倒对老年人构成威胁，导致髋部骨折。容易跌倒的人必须接受训练，以便在跌倒时向后外侧方向恢复平衡。本研究旨在分析横向倾斜平台引起的反作用阶跃的特性。这项横断面研究包括 46 名健康参与者，他们使用每侧都有两个倾斜角度的平台进行“倾斜和释放”向后跌倒。使用Kinovea软件来分析步长。反应性步伐，以交叉或脚内侧放置为特征，是预防后外侧跌倒的预防措施。第一个目标是缩小步幅宽度，使用方差分析 (ANOVA) 和 Tukey 事后评估对其进行分析，表明有后外侧跌倒的趋势。作为我们第二个目标的一部分，倾斜的平台导致腿之间的负载不均匀，优先选择卸载的腿作为反应腿（），由 Fisher 精确检验和 Cramer V 确定。这些特征与改良约束诱导运动疗法 (mCIMT) 中观察到的特征密切相关。倾斜平台对选择反应腿有显着影响，特别是在较高角度时（）。因此，研究表明该装置能够诱导后外侧跌倒并表现出 mCIMT 特性。