Department of Physical Therapy and School of Health and Environmental Science, College of Health Science, Korea University, Seoul, Republic of Korea.
Department of Sports Medical Center, Korea University College of Medicine, Anam Hospital, Seoul, Republic of Korea.
Sports Health. 2021 Sep-Oct;13(5):482-489. doi: 10.1177/1941738121993777. Epub 2021 Feb 20.
Limited data are available on the effect of stretching exercise in patients with patellofemoral pain (PFP) who have inflexible quadriceps, which is one of the various causes of PFP syndrome. This study compares quadriceps flexibility, strength, muscle activation time, and patient-reported outcomes after static and dynamic quadriceps stretching exercises in patients with PFP who had inflexible quadriceps.
Quadriceps flexibility and strength, muscle activation time, and patient-reported outcomes would improve with dynamic quadriceps stretching as compared with static quadriceps stretching exercises.
Randomized controlled trial.
Level 2.
Of the 44 patients included in the study, 20 performed static stretching and 24 performed dynamic stretching. Quadriceps flexibility was assessed by measuring the knee flexion angle during knee flexion in the prone position (the Ely test). Muscle strength and muscle activation time were measured using an isokinetic device. The patient-reported outcomes were evaluated using the visual analogue scale for pain and anterior knee pain scale.
No significant differences in quadriceps flexibility and strength, muscle activation time, and patient-reported outcomes in the involved knees were found between the 2 groups ( values > 0.05).
Quadriceps flexibility and strength, muscle activation time, and patient-reported outcomes in patients with PFP who had inflexible quadriceps showed no significant differences between the static and dynamic quadriceps stretching exercise groups.
Both static and dynamic stretching exercises may be effective for improving pain and function in patients with PFP who have inflexible quadriceps.
对于股四头肌紧张的髌股疼痛（PFP）患者，伸展运动的效果数据有限，而股四头肌紧张是 PFP 综合征的多种病因之一。本研究比较了股四头肌紧张的 PFP 患者进行静态和动态股四头肌伸展运动后，股四头肌柔韧性、力量、肌肉激活时间和患者报告的结局。
与静态股四头肌伸展运动相比，动态股四头肌伸展运动可改善股四头肌柔韧性和力量、肌肉激活时间以及患者报告的结局。
随机对照试验。
2 级。
在纳入的 44 名患者中，20 名患者进行静态伸展运动，24 名患者进行动态伸展运动。通过在俯卧位下测量膝关节屈曲时的膝关节屈曲角度（Ely 试验）来评估股四头肌柔韧性。使用等速设备测量肌肉力量和肌肉激活时间。使用视觉模拟量表（VAS）评估疼痛和前膝痛量表评估患者报告的结局。
两组患者（P 值>0.05）患侧膝关节的股四头肌柔韧性和力量、肌肉激活时间以及患者报告的结局无显著差异。
对于股四头肌紧张的 PFP 患者，静态和动态股四头肌伸展运动在改善疼痛和功能方面没有显著差异。
对于股四头肌紧张的 PFP 患者，静态和动态伸展运动均可能有效改善疼痛和功能。
