Xie Lingchao, Cho Sanghyun
Department of Physical Therapy, Yonsei University, Wonju 26493, Republic of Korea.
J Clin Med. 2023 Aug 10;12(16):5215. doi: 10.3390/jcm12165215.
The step-aside movement, also known as the dodging step, is a common maneuver for avoiding obstacles while walking. However, differences in neural control mechanisms and ankle strategies compared to straight walking can pose a risk of falling. This study aimed to examine the differences in tibialis anterior (TA), peroneus longus (PL), and soleus (SOL) muscle contractions, foot center of pressure (CoP) displacement, and ground reaction force (GRF) generation between step-aside movement and straight walking to understand the mechanism behind step-aside movement during walking. Twenty healthy young male participants performed straight walking and step-aside movements at comfortable walking speeds. The participants' muscle contractions, CoP displacement, and GRF were measured. The results show significant greater bilateral ankle muscle contractions during the push and loading phases of step-aside movement than during straight walking. Moreover, the CoP displacement, GRF generation mechanism, and timing differed from those observed during straight walking. These findings provide valuable insights for rehabilitation professionals in the development of clinical decisions for populations at a risk of falls and lacking gait stability.
侧步移动，也称为闪避步，是行走时避开障碍物的常见动作。然而，与直线行走相比，其神经控制机制和踝关节策略的差异可能会带来跌倒风险。本研究旨在探讨侧步移动和直线行走之间胫骨前肌（TA）、腓骨长肌（PL）和比目鱼肌（SOL）的肌肉收缩、足部压力中心（CoP）位移以及地面反作用力（GRF）产生的差异，以了解行走过程中侧步移动背后的机制。20名健康年轻男性参与者以舒适的步行速度进行直线行走和侧步移动。测量了参与者的肌肉收缩、CoP位移和GRF。结果显示，在侧步移动的推蹬和承重阶段，双侧踝关节肌肉收缩明显大于直线行走时。此外，CoP位移、GRF产生机制和时间与直线行走时观察到的情况不同。这些发现为康复专业人员制定针对有跌倒风险和步态不稳定人群的临床决策提供了有价值的见解。
