Motojima Naoyuki, Yamamoto Sumiko, Kohno Toshiyuki
School of Nursing and Rehabilitation Science, Showa Medical University, Yokohama, Kanagawa 226-8555, Japan; Showa Medical University Fujigaoka Rehabilitation Hospital, Yokohama, Kanagawa 227-8518, Japan.
Graduate School, International University of Health and Welfare, Minato-ku, Tokyo 107-8402, Japan.
Clin Biomech (Bristol). 2025 Oct;129:106636. doi: 10.1016/j.clinbiomech.2025.106636. Epub 2025 Aug 5.
The sit-to-stand movement is important for the rehabilitation of individuals with poststroke hemiplegia. This study aimed to clarify the variation in kinetic and kinematic characteristics of sit-to-stand movements according to differences in the ability of individuals with poststroke hemiplegia.
Twenty five individuals in the subacute phase of stroke-induced hemiplegia, who needed assistance to practice the sit-to-stand movement (dependent group) and 25 individuals in the subacute phase of stroke-induced hemiplegia who could stand up independently (independent group) were selected for the study. To ensure a fair comparison, the two groups were matched for age, sex, body size, and the paretic side. The sit-to-stand movement was quantified using a three-dimensional motion-analysis system, and the resulting kinetics, kinematics of thorax, pelvis and lower limb, and weight bearing were compared.
The dependent group exhibited significantly reduced hip flexion torque and significantly greater thoracic and pelvic anterior tilt prior to seat-off than the independent group. After seat-off, the dependent group exhibited significantly reduced paretic knee extension torque and significantly greater weight bearing on the nonparetic side, along with significantly elevated hip extension torque on the paretic and non-paretic sides, in comparison to the independent group.
The kinetic and kinematic characteristics of the sit-to-stand maneuver before seat-off in the dependent group poststroke differ from those in the independent poststroke individuals, as previously reported. These findings also suggest that weight-bearing on the non- paretic side is key in the sit-to-stand movement of dependent individuals.
从坐到站的动作对于中风后偏瘫患者的康复至关重要。本研究旨在根据中风后偏瘫患者能力的差异，阐明从坐到站动作的动力学和运动学特征的变化。
选取25名处于中风后偏瘫亚急性期、需要协助进行从坐到站动作的患者（依赖组）和25名处于中风后偏瘫亚急性期、能够独立站立的患者（独立组）进行研究。为确保公平比较，两组在年龄、性别、身体尺寸和偏瘫侧别方面进行了匹配。使用三维运动分析系统对从坐到站的动作进行量化，并比较由此得出的动力学、胸部、骨盆和下肢的运动学以及负重情况。
与独立组相比，依赖组在离座前表现出明显降低的髋部屈曲扭矩以及明显更大的胸部和骨盆前倾。离座后，与独立组相比，依赖组患侧膝关节伸展扭矩明显降低，非患侧负重明显增加，同时患侧和非患侧髋部伸展扭矩明显升高。
如先前报道，依赖组中风患者在离座前从坐到站动作的动力学和运动学特征与独立中风患者不同。这些发现还表明，非患侧负重是依赖个体从坐到站动作的关键。
