School of Business and Engineering, Department of Exercise Physiology, Biomechanics and Health, Halmstad University, Halmstad, Sweden.
J Rehabil Med. 2012 Jun;44(7):605-8. doi: 10.2340/16501977-0986.
Balance between flexor and extensor muscle activity is essential for optimal function. The purpose of this pilot study was to compare the relationship between maximum finger flexion force and maximum finger extension force in women with rheumatoid arthritis and healthy women.
Twenty healthy women (median age 61 years) and 20 women with rheumatoid arthritis (median age 59.5 years, median disease duration 16.5 years) were included in the study. Finger extension force was measured with an electronic device, EX-it, and finger flexion force using Grippit. The Grip Ability Test and the score from the patient-reported outcome Disability Arm Shoulder and Hand were used to evaluate activity limitations.
Patients with rheumatoid arthritis showed significantly decreased hand function compared with healthy controls. A correlation was found between extension force and flexion force in the healthy group (r = 0.65, p = 0.002),but not in the rheumatoid arthritis group (r = 0.25, p = 0.289).
Impaired hand function appears to influence the relationship between maximum finger flexion and extension force. This study showed a difference in the relationship between maximum finger flexion and extension force in healthy controls and those with rheumatoid arthritis.
屈肌和伸肌活动之间的平衡对于最佳功能至关重要。本初步研究的目的是比较类风湿关节炎女性和健康女性的最大手指屈肌力量和最大手指伸肌力量之间的关系。
研究纳入了 20 名健康女性（中位年龄 61 岁）和 20 名类风湿关节炎女性（中位年龄 59.5 岁，中位疾病病程 16.5 年）。使用电子设备 EX-it 测量手指伸展力，使用 Grippit 测量手指屈曲力。使用握力测试和患者报告的残疾上肢肩手结果量表评分来评估活动受限情况。
与健康对照组相比，类风湿关节炎患者的手部功能明显下降。在健康组中，伸展力与屈曲力之间存在相关性（r = 0.65，p = 0.002），但在类风湿关节炎组中无相关性（r = 0.25，p = 0.289）。
手部功能受损似乎会影响最大手指屈肌和伸肌力量之间的关系。本研究显示了健康对照组和类风湿关节炎患者之间最大手指屈肌和伸肌力量之间关系的差异。
