Department of Athletic Training and Physical Therapy, University of North Florida, 1 UNF Drive, Jacksonville, FL 32224, USA.
J Athl Train. 2009 Jan-Feb;44(1):7-13. doi: 10.4085/1062-6050-44.1.7.
Individuals suffering from patellofemoral pain have previously been reported to have decreased isometric strength of the hip musculature; however, no researchers have investigated concentric and eccentric torque of the hip musculature in individuals with patellofemoral pain.
To compare concentric and eccentric torque of the hip musculature in individuals with and without patellofemoral pain.
Case control.
Research laboratory.
Twenty participants with patellofemoral pain (age = 26.8 +/- 4.5 years, height = 171.8 +/- 8.4 cm, mass = 72.4 +/- 16.8 kg) and 20 control participants (age = 25.6 +/- 2.8 years, height = 169.5 +/- 8.9 cm, mass = 70.0 +/- 16.9 kg) were tested. Volunteers with patellofemoral pain met the following criteria: knee pain greater than or equal to 3 cm on a 10-cm visual analog scale, insidious onset of symptoms not related to trauma, pain with palpation of the patellar facets, and knee pain during 2 of the following activities: stair climbing, jumping or running, squatting, kneeling, or prolonged sitting. Control participants were excluded if they had a prior history of patellofemoral pain, knee surgery in the past 2 years, or current lower extremity injury that limited participation in physical activity.
INTERVENTION(S): Concentric and eccentric torque of the hip musculature was measured on an isokinetic dynamometer. All volunteers performed 5 repetitions of each strength test. Separate multivariate analyses of variance were performed to compare concentric and eccentric torque of the hip extensors, abductors, and external rotators between groups.
MAIN OUTCOME MEASURE(S): Average and peak concentric and eccentric torque of the hip extensors, abductors, and external rotators. Torque measures were normalized to the participant's body weight multiplied by height.
The patellofemoral pain group was weaker than the control group for peak eccentric hip abduction torque (F(1,38) = 6.630, P = .014), and average concentric (F(1,38) = 4.156, P = .048) and eccentric (F(1,38) = 4.963, P = .032) hip external rotation torque.
The patellofemoral pain group displayed weakness in eccentric hip abduction and hip external rotation, which may allow for increased hip adduction and internal rotation during functional movements.
先前有研究报道，髌股疼痛患者髋关节肌肉等长力量下降；但是，尚无研究调查髌股疼痛患者髋关节肌肉的向心和离心扭矩。
比较髌股疼痛患者与无髌股疼痛患者髋关节肌肉的向心和离心扭矩。
病例对照。
研究实验室。
20 名髌股疼痛患者（年龄=26.8±4.5 岁，身高=171.8±8.4cm，体重=72.4±16.8kg）和 20 名对照参与者（年龄=25.6±2.8 岁，身高=169.5±8.9cm，体重=70.0±16.9kg）接受了测试。符合以下标准的志愿者被诊断为髌股疼痛：疼痛视觉模拟评分（VAS）≥3cm，症状隐匿性发作与创伤无关，髌股关节触诊时有疼痛，以及以下 2 种活动时出现膝关节疼痛：爬楼梯、跳跃或跑步、下蹲、下跪或长时间坐着。如果参与者有髌股疼痛病史、过去 2 年内膝关节手术史或目前下肢损伤限制了身体活动，则将其排除在对照之外。
在等速测力计上测量髋关节肌肉的向心和离心扭矩。所有志愿者均进行了 5 次力量测试。使用多元方差分析分别比较两组之间髋关节伸肌、外展肌和外旋肌的向心和离心扭矩。
髋关节伸肌、外展肌和外旋肌的平均和峰值向心和离心扭矩。将扭矩测量值归一化为参与者的体重乘以身高。
与对照组相比，髌股疼痛组在峰值离心髋关节外展扭矩（F(1,38)=6.630，P=.014）以及平均向心（F(1,38)=4.156，P=.048）和离心（F(1,38)=4.963，P=.032）髋关节外旋扭矩方面均较弱。
髌股疼痛组在离心髋关节外展和髋关节外旋方面表现出无力，这可能导致功能运动时髋关节内收和内旋增加。
