Yang Feng, Liu Wei
Department of Kinesiology and Health, Georgia State University, Atlanta, GA, 30303, United States.
School of Health Professions, University of Texas Health Science Center at San Antonio, San Antonio, TX, 78229, United States.
Gait Posture. 2021 May;86:22-26. doi: 10.1016/j.gaitpost.2021.02.025. Epub 2021 Feb 25.
Tai Chi (TC) training has been increasingly used to prevent falls. However, the underlying biomechanical mechanisms of TC training which influence fall risk remain unknown. As a result, the selection of TC forms differs among studies, leading to inconsistent results.
Is dynamic stability different between the simplified 24 Yang-style TC forms among adults with knee osteoarthritis?
Ten participants with mild to moderate knee osteoarthritis were recruited. Under one-on-one instruction by an experienced TC master, each participant learned how to correctly perform the 24-form TC movements. Participants' full-body kinematic and kinetic data was collected during walking trials and performance of the respective TC forms. Their dynamic stability was calculated in both sagittal and frontal planes and compared between each TC form and regular walking.
The results indicate that dynamic stability in both planes significantly varies among forms. Moreover, some forms pose a greater challenge to dynamic stability in comparison to others. The most challenging TC forms are Form 8 for stability in the sagittal plane and Form 10 in the frontal plane. Among all forms, Form 1 appears to be the least challenging.
Our findings could provide foundational information to identify the best TC forms for optimizing the effectiveness of TC-based fall prevention interventions.
太极拳（TC）训练越来越多地用于预防跌倒。然而，影响跌倒风险的TC训练潜在生物力学机制尚不清楚。因此，不同研究中TC形式的选择不同，导致结果不一致。
膝关节骨关节炎成人中，简化24式杨氏TC形式之间的动态稳定性是否不同？
招募了10名轻度至中度膝关节骨关节炎患者。在一位经验丰富的TC大师一对一指导下，每位参与者学习如何正确完成24式TC动作。在步行试验和各自的TC形式表演过程中收集参与者的全身运动学和动力学数据。计算他们在矢状面和额状面的动态稳定性，并在每种TC形式和正常步行之间进行比较。
结果表明，两种平面内的动态稳定性在不同形式之间有显著差异。此外，与其他形式相比，有些形式对动态稳定性构成更大挑战。矢状面稳定性方面最具挑战性的TC形式是第8式，额状面是第10式。在所有形式中，第1式似乎是最不具挑战性的。
我们的研究结果可为确定最佳TC形式提供基础信息，以优化基于TC的跌倒预防干预措施的有效性。
