Lee Jejeong, Lee Yongwoo
Department of Physical Therapy, Graduate School, Sahmyook University, Seoul 01795, Republic of Korea.
Department of Physical Therapy, College of Health and Welfare, Sahmyook University, Seoul 01795, Republic of Korea.
Healthcare (Basel). 2023 Nov 23;11(23):3023. doi: 10.3390/healthcare11233023.
Spinal manipulation (SM) is a common manual therapy technique; however, there is limited knowledge regarding the coordination of hand and foot forces during SM. This study investigated the biomechanics of force transmission and generation in the hands and feet of a single therapist who performed pelvic SM on 45 healthy subjects. Two force plates were used to measure the ground reaction forces (GRF) from the feet, and one controller was used to measure the contact hand forces (CHF). The results showed that foot force preceded hand force and that the foot and hand exhibited opposing patterns of force variation. The CHF peak was positively correlated with the CH preload maximum and minimum forces and negatively correlated with the GRF run-down. These findings suggested that the therapist used a coordinated strategy of avoiding weight support with the feet and supporting the weight with the hands to amplify the thrust force. This study provides new insights into the biomechanics of SM and has implications for teaching, motor learning, and safety.
脊柱推拿（SM）是一种常见的手法治疗技术；然而，关于脊柱推拿过程中手和脚力量的协调，目前所知有限。本研究调查了一名对45名健康受试者进行骨盆脊柱推拿的治疗师的手和脚在力的传递与产生方面的生物力学情况。使用两个测力板测量来自双脚的地面反作用力（GRF），并使用一个控制器测量手部接触力（CHF）。结果表明，脚部力量先于手部力量，且脚和手呈现出相反的力变化模式。手部接触力峰值与手部预负荷的最大和最小力呈正相关，与地面反作用力的下降呈负相关。这些发现表明，治疗师采用了一种协调策略，即避免用脚支撑体重，而是用手支撑体重以放大推力。本研究为脊柱推拿的生物力学提供了新的见解，并对教学、运动学习和安全具有启示意义。
