Department of Medical Rehabilitation Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia.
Department of Physical Therapy, College of Applied Medical Sciences, Najran University, Najran, Saudi Arabia.
BMC Musculoskelet Disord. 2022 May 12;23(1):444. doi: 10.1186/s12891-022-05403-9.
Knee osteoarthritis (KOA) is a painful degenerative joint disease that may limit activities of daily living. This study aimed to determine the relationship between quadriceps endurance and knee joint position sense (JPS) in KOA individuals and compare the quadriceps endurance and knee JPS with and without KOA.
This comparative cross-sectional study was conducted in medical rehabilitation clinics, King Khalid University, Saudi Arabia. This study recruited 50 individuals diagnosed with unilateral KOA (mean age = 67.10 ± 4.36 years) and 50 asymptomatic individuals (mean age = 66.50 ± 3.63 years). Quadriceps isometric endurance capacity (sec) was measured using a fatigue resistance test, and knee JPS (degrees) were assessed using a digital inclinometer and evaluated in sitting and standing positions.
Quadriceps isometric endurance showed a significant moderate negative correlation with knee JPS in 20° of flexion (r = -0.48, p < 0.001); 40° of flexion: r = -0.62, p < 0.001; 60° of flexion: r = -0.58, p < 0.001) in sitting and 20° of flexion (r = -0.25, p = 0.084) in standing position in KOA individuals. When compared to the asymptomatic, the quadriceps endurance was lower (p < 0.001), and knee joint position errors were larger (p < 0.001) in KOA individuals.
Results of this study showed that quadriceps endurance capacity is negatively associated with knee JPS. KOA individuals demonstrated lower quadriceps endurance and larger JPS compared to asymptomatic.
膝骨关节炎（KOA）是一种会导致疼痛的退行性关节疾病，可能会限制日常生活活动。本研究旨在确定 KOA 患者股四头肌耐力与膝关节位置觉（JPS）之间的关系，并比较 KOA 患者与无症状患者的股四头肌耐力和膝关节 JPS。
这是一项在沙特阿拉伯 King Khalid 大学医学康复诊所进行的对比性横断面研究。本研究招募了 50 名单侧 KOA 患者（平均年龄=67.10±4.36 岁）和 50 名无症状个体（平均年龄=66.50±3.63 岁）。使用疲劳阻力测试测量股四头肌等长耐力（秒），使用数字测斜仪评估膝关节 JPS（度），并在坐姿和站姿下进行评估。
在 KOA 患者中，股四头肌等长耐力与 20°屈曲时的膝关节 JPS（r=-0.48，p<0.001）、40°屈曲时的膝关节 JPS（r=-0.62，p<0.001）、60°屈曲时的膝关节 JPS（r=-0.58，p<0.001）呈显著中度负相关；在坐姿下的 20°屈曲（r=-0.25，p=0.084）。与无症状个体相比，KOA 患者的股四头肌耐力较低（p<0.001），膝关节位置觉误差较大（p<0.001）。
本研究结果表明，股四头肌耐力与膝关节 JPS 呈负相关。与无症状个体相比，KOA 患者的股四头肌耐力较低，膝关节位置觉误差较大。
