Park Sun Wook, Son Sung Min, Lee Na Kyung
Department of Physical Therapy, Faculty of Health Science, Eulji University, Seongnam-si, Gyeonggi-do, Republic of Korea.
Department of Physical Therapy, College of Health Science, Cheongju University, Cheongju-si, Chungbuk, Republic of Korea.
Neural Regen Res. 2017 May;12(5):765-769. doi: 10.4103/1673-5374.206647.
This study aimed to investigate the effects of exercise-induced muscle fatigue in the unaffected knee joint on postural control and kinematic changes in stroke patients. Forty participants (20 stroke patients, 20 age-matched healthy participants) were recruited. To induce fatigue, maximum voluntary isometric contractions were performed in the unaffected knee joint in a Leg Extension Rehab exercise machine using the pneumatic resistance. We measured static and dynamic balance and lower-limb kinematics during gait. Changes in postural control parameters anteroposterior sway speed and total center of pressure distance differed significantly between the stroke and control groups. In addition, changes in gait kinematic parameters knee and ankle angles of initial contact differed significantly between stroke (paretic and non-paretic) and control groups. Muscle fatigue in the unaffected knee and ankle impaired postural control and debilitates kinematic movement of ipsilateral and contralateral lower limbs, and may place the fatigued stroke patients at greater risk for falls.
本研究旨在探讨未受影响膝关节的运动诱导肌肉疲劳对中风患者姿势控制和运动学变化的影响。招募了40名参与者（20名中风患者，20名年龄匹配的健康参与者）。为了诱导疲劳，在腿部伸展康复运动器械中使用气动阻力，在未受影响的膝关节进行最大自主等长收缩。我们测量了步态期间的静态和动态平衡以及下肢运动学。中风组和对照组之间，姿势控制参数前后摆动速度和总压力中心距离的变化存在显著差异。此外，中风组（患侧和非患侧）与对照组之间，步态运动学参数初始接触时的膝关节和踝关节角度变化存在显著差异。未受影响的膝关节和踝关节的肌肉疲劳会损害姿势控制，并削弱同侧和对侧下肢的运动学运动，可能使疲劳的中风患者面临更大的跌倒风险。
