Department of Sport Injuries and Corrective Exercises, Faculty of Sport Sciences, Bu-Ali Sina University, Hamedan, Iran.
J Orthop Surg Res. 2024 Aug 6;19(1):462. doi: 10.1186/s13018-024-04911-9.
The center of pressure (COP) excursion parameters are recognized as risk factors for the etiology and development of patellofemoral pain (PFP). The purpose of the present study measures the effect of pain exacerbation on COP excursion, and the correlation between pain intensity and COP excursion in women with PFP during single leg squat (SLS).
Sixty patients with PFP participated in this cross-sectional study. The outcome measures were included pain intensity and COP excursion which evaluated in pre and post pain exacerbation during SLS. The COP parameters were evaluated during single leg squat in 60° of knee flexion. A paired t-test and MANOVA was used to compare pain intensity and COP excursion between the two conditions, respectively. Furthermore, A Pearson's correlation matrix was used to examine the relationship between pain intensity with COP excursion.
Statistical analysis showed that pain intensity (t = - 16.655, p < 0.001) and COP excursion (Wilks' Lambda = 0.225, p < 0.001) with medium effect size increased after PFJ loading. In addition, an excellent positive correlation was observed between increased in pain intensity and COP excursion (P < 0.001, r > 0.80).
After PFJ loading, women with PFP presented increases in the pain intensity, COP excursions, and sway velocity. In addition, there was an association between the increase in pain intensity and COP excursions. Clinicians aiming to improve postural control of patients with PFP could use kinesio taping as a short-term intervention and balance training to improvements in postural control at medium and long-term. Furthermore, emphasizing psychological factors to reducing kinesiophobia can be useful to restoring proper movement pattern, reducing pain and improving symptoms.
压力中心（COP）偏移参数被认为是髌股疼痛（PFP）病因学和发展的危险因素。本研究旨在测量疼痛加剧对 COP 偏移的影响，以及 PFP 女性在单腿深蹲（SLS）期间疼痛强度与 COP 偏移之间的相关性。
本横断面研究纳入了 60 名 PFP 患者。在 SLS 过程中，评估了疼痛加剧前后的疼痛强度和 COP 偏移。在膝关节屈曲 60°时进行单腿深蹲，评估 COP 参数。采用配对 t 检验和 MANOVA 分别比较两种情况下的疼痛强度和 COP 偏移。此外，还采用 Pearson 相关矩阵来检验疼痛强度与 COP 偏移之间的关系。
统计分析显示，疼痛强度（t=-16.655，p<0.001）和 COP 偏移（Wilks' Lambda=0.225，p<0.001）均呈中等效应量增加。此外，疼痛强度增加与 COP 偏移之间存在极好的正相关（P<0.001，r>0.80）。
PFJ 加载后，PFP 女性的疼痛强度、COP 偏移和摇摆速度均增加。此外，疼痛强度增加与 COP 偏移之间存在相关性。临床医生旨在改善 PFP 患者的姿势控制，可以使用肌内效贴短期干预和平衡训练来改善中、长期的姿势控制。此外，强调心理因素以减少运动恐惧症可能有助于恢复适当的运动模式、减轻疼痛和改善症状。
