Graduate Department of Exercise Sciences, University of Toronto, Toronto, ON, Canada; Department of Kinesiology, Brock University, St. Catharines, ON, Canada.
Gait Posture. 2013 Sep;38(4):888-93. doi: 10.1016/j.gaitpost.2013.04.007. Epub 2013 May 10.
Despite the established relationship between low balance confidence and poorer balance and gait performance, discrepancies may occur between an individual's perceived and actual abilities. This study determined if trunk sway measures could assist in identifying potential discrepancies between perceived and actual balance. Older women completed the Activities-specific Balance Confidence (ABC) scale and performed a series of 16 stance, gait and tandem gait tasks. Duration (or completed steps for tandem gait tasks) and trunk pitch and roll angle and angular velocity were calculated. Low (mean ABC score≤70%, n=33) and high (mean ABC score≥90%, n=99) balance confidence groups were identified from a pool of 204 participants. The low balance confidence group had greater stance trunk pitch and roll sway, shorter one leg stance durations, reduced gait trunk roll sway, longer gait durations, less tandem gait trunk roll sway and completed fewer tandem gait steps compared to the high balance confidence group. Stepwise linear discriminant analysis identified four variables that were used to achieve a classification accuracy of 75.8% for low and 90.9% for high balance confidence groups. This study reinforces the influence of low balance confidence on stance and gait control and provides direction for the identification and treatment of individuals with discrepancies between perceived and actual balance.
尽管平衡信心低与平衡和步态表现差之间存在已确立的关系，但个体感知能力和实际能力之间可能存在差异。本研究旨在确定躯干摆动测量是否可以帮助识别感知和实际平衡之间的潜在差异。老年女性完成了特定活动的平衡信心量表（ABC）和一系列 16 个站位、步态和串联步态任务。计算了持续时间（或完成串联步态任务的步骤）以及躯干俯仰和滚动角度和角速度。从 204 名参与者中选出平衡信心低（平均 ABC 得分≤70%，n=33）和高（平均 ABC 得分≥90%，n=99）的两个组。与平衡信心高的组相比，平衡信心低的组在站位时躯干俯仰和滚动摆动更大，单腿站立持续时间更短，步态时躯干滚动摆动减少，步态持续时间更长，串联步态时躯干滚动摆动更少，完成的串联步态步骤更少。逐步线性判别分析确定了四个变量，这些变量用于实现低平衡信心组的分类准确率为 75.8%，高平衡信心组的分类准确率为 90.9%。本研究强化了低平衡信心对站位和步态控制的影响，并为识别和治疗感知和实际平衡之间存在差异的个体提供了方向。
