Patients with stroke experience declined physical functions and aim to recover by rehabilitation. It is important to improve their functions in the subacute period. Hemiplegic patients who can stand exhibit differing characteristics such as the center of mass and muscle synergy compared to healthy subjects. However, the characteristics to be achieved by the sit-to-stand motion in the subacute period is unknown. This study investigated the sit-to-stand motions of hemiplegic patients (n = 21) in three months of stroke onset. The patients were partitioned into two groups (‘mild’ and ‘severe’), based on the functional independence score at the time of discharge, and the patient's sit-to-stand motion in the subacute period was analyzed by muscle synergy and kinematics. The severe patients performed a biased standing on the non-paralyzed side, and the activation timing of muscle synergy that contributes to whole-body extension was earlier than that of the mild patients. This study contributes to the development of guidelines for optimal intervention for each patient.

有中风经历的患者身体机能下降，旨在通过康复康复。在亚急性期改善其功能很重要。与健康受试者相比，能够站立的偏瘫患者表现出不同的特征，例如重心和肌肉协同作用。然而，亚急性期从坐到站运动要达到的特征尚不清楚。本研究调查了偏瘫患者（n = 21) 在中风发作的三个月内。根据出院时的功能独立性评分将患者分为两组（“轻度”和“重度”），并通过肌肉协同和运动学分析亚急性期患者的坐立运动。重症患者偏向于非瘫痪侧站立，有助于全身伸展的肌肉协同激活时间早于轻症患者。该研究有助于为每位患者制定最佳干预指南。