Department of Applied Mechanics, Faculty of Mechanical Engineering, Budapest University of Technology and Economics, Budapest, Hungary.
J Biomech. 2022 Jun;138:111117. doi: 10.1016/j.jbiomech.2022.111117. Epub 2022 May 7.
The relation between balancing performance on rolling balance board and reaction time is investigated. Ten young healthy adults performed balancing trials on a rolling balance board with different wheel radius R and stance widths d in the frontal plane. A 2- and a 3-degree-of-freedom models subject to delayed state feedback with a single lumped reaction delay were created in order to describe hip and hip-lumbar strategies. The critical delays of the underlying models, for which state feedback stabilization is still possible, were determined. This critical delay is a good measure of the difficulty of the balancing task: the smaller the critical delay, the more difficult the balancing task. Subjects' response time to visual stimuli correlates with the critical delay of the models, therefore, it can be used as an indirect indicator for balancing skill. Hip-lumbar strategy was found to be superior to pure hip strategy in the sense that it allows larger reaction delay. Overall, rolling balance board is a simple and convenient tool to assess human's balancing skill. The difficulty of the task can be tuned by employing different wheel radius with different stance widths while it can be measured by a single number: the critical delay of the underlying model. Improvement in balancing skill therefore can easily be monitored during balance therapy and physical rehabilitation.
研究了在滚动平衡板上的平衡性能与反应时间之间的关系。十个年轻健康的成年人在滚动平衡板上进行了平衡试验，平衡板的轮半径 R 和支撑宽度 d 在额状面上不同。为了描述髋关节和髋关节-腰椎策略，创建了具有单个集中反应延迟的延迟状态反馈的 2 自由度和 3 自由度模型。确定了基础模型的临界延迟，在此延迟下，状态反馈仍然是可能的。这个临界延迟是平衡任务难度的一个很好的衡量标准：临界延迟越小，平衡任务越难。受试者对视觉刺激的反应时间与模型的临界延迟相关，因此，它可以作为平衡技能的间接指标。与纯髋关节策略相比，髋关节-腰椎策略具有优越性，因为它允许更大的反应延迟。总的来说，滚动平衡板是一种简单方便的工具，可以评估人类的平衡技能。通过使用不同的轮半径和不同的支撑宽度，可以调整任务的难度，而可以通过单个数字来测量：基础模型的临界延迟。因此，在平衡治疗和身体康复期间，可以很容易地监测平衡技能的提高。
