Federal University of São Paulo, Orthopaedic and Traumatologic Department, São Paulo, Brazil.
J Orthop Sports Phys Ther. 2010 Oct;40(10):641-7. doi: 10.2519/jospt.2010.3120.
Cross-sectional study.
To compare the hip strength of sedentary females with either unilateral or bilateral patellofemoral pain syndrome (PFPS) to a control group of sedentary females of similar demographics without PFPS.
It has been suggested that hip muscle weakness may be an important factor in the etiology of young female athletes with PFPS. This syndrome is also common in sedentary females and it is unclear if similar findings of hip weakness would be present in this population.
Females between 15 and 40 years of age (control group, n = 50; unilateral PFPS, n = 21; bilateral PFPS, n = 29) participated in the study. Strength for all 6 hip muscle groups was measured bilaterally on all subjects using a handheld dynamometer.
The hip musculature of sedentary females with bilateral PFPS was statistically weaker (range, 12%-36%; P<.05) than that of the control group for all muscle groups. The hip abductors, lateral rotators, flexors, and extensors of the injured side of those with unilateral PFPS group were statistically weaker (range, 15%-20%; P<.05)than that of the control group, but only the hip abductors were significantly weaker when compared to their uninjured side (20%; P<.05).
This study demonstrates that hip weakness is a common finding in sedentary females with PFPS.
横断面研究。
比较单侧或双侧髌股关节疼痛综合征（PFPS）的久坐女性与无 PFPS 的久坐女性对照组的髋部力量。
有人认为，髋部肌肉无力可能是年轻女性运动员 PFPS 的重要病因。这种综合征在久坐的女性中也很常见，目前尚不清楚在这一人群中是否会出现类似的髋部力量减弱的发现。
15 至 40 岁的女性（对照组，n = 50；单侧 PFPS，n = 21；双侧 PFPS，n = 29）参与了这项研究。使用手持测力计对所有受试者的双侧 6 个髋部肌肉群的力量进行测量。
双侧 PFPS 的久坐女性的髋部肌肉在所有肌肉群中均明显较弱（范围为 12％-36％；P<.05），与对照组相比。单侧 PFPS 组中，患侧的髋外展肌、外侧旋转肌、屈肌和伸肌明显较弱（范围为 15％-20％；P<.05），与对照组相比，但与未受伤侧相比，仅髋外展肌明显较弱（20％；P<.05）。
本研究表明，髋部力量减弱是 PFPS 久坐女性的常见现象。
