PDF(Pubmed)
Abstract：
This pilot study aimed to investigate the immediate impact of low-intensity exercises with blood flow restriction (BFR) on older adults with knee osteoarthritis (KOA). Fifteen patients with KOA who were over 50 years old, participated and underwent low-intensity resistance knee exercises at 30% of their one-repetition maximum with BFR three times/week for two weeks. Pre- and post-exercise assessments included pain levels, Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC) scores, isokinetic knee strength, lower extremity muscle volume (via leg circumference and muscle thickness), functional performance tests (timed up-and-go [TUG] and sit-to-stand [STS]), skeletal muscle index (SMI) using bioelectrical impedance analysis, and handgrip strength (HGS). Post-exercise, there was a significant reduction in pain. WOMAC scores showed significant improvements across all three domains: pain, stiffness, and physical function. In the TUG and STS tests, completion times were significantly reduced. Thigh and calf circumferences, as well as thigh muscle thickness significantly increased after exercise. Post-exercise SMI and HGS also significantly increased. However, isokinetic knee strength did not show significant changes. In conclusion, low-intensity BFR exercises provide immediate benefits in symptoms and physical performance for patients with KOA, potentially inducing local and systemic muscle mass increase, even after a short-term intervention.
摘要：
这项初步研究旨在研究低强度运动伴血流限制（BFR）对患有膝骨关节炎（KOA）的老年人的直接影响。15名50岁以上的KOA患者，参加并接受了低强度阻力膝关节运动，其最大重复次数为30％，BFR每周三次，共两周。运动前和运动后的评估包括疼痛水平，西安大略省和麦克马斯特大学骨关节炎指数（WOMAC）得分，等速膝关节强度，下肢肌肉体积（通过腿部周长和肌肉厚度），功能性能测试(定时启动和运行[TUG]和坐立[STS])，使用生物电阻抗分析的骨骼肌指数（SMI），和手握强度（HGS）。锻炼后，疼痛明显减轻。WOMAC评分在所有三个领域都显示出显着改善：疼痛，刚度,和身体功能。在TUG和STS测试中，完成时间显著缩短。大腿和小腿的圆周,以及运动后大腿肌肉厚度明显增加。运动后SMI和HGS也显著增加。然而,等速运动的膝关节强度没有显着变化。总之,低强度BFR锻炼对KOA患者的症状和身体表现有直接的益处，可能导致局部和全身肌肉质量增加，即使在短期干预之后。
