Background

Although it is assumed that the presence of patellofemoral pain (PFP) may result in compensatory behaviors that can alter trunk kinematics and lower limb mechanics, the influence of the exacerbation of patellofemoral pain on trunk kinematics and lower limb mechanics during stair negotiation has not been established.

Research question

Does the exacerbation of PFP symptoms lead to altered trunk kinematics and lower limb mechanics during stair negotiation?

Methods

Three-dimensional kinematics and kinetics were obtained from 45 women with PFP during stair descent and ascent. Data were obtained before and after a pain exacerbation protocol. The variables of interest were peak trunk, hip, and knee flexion, and ankle dorsiflexion; peak hip, and knee extensor, and ankle plantarflexor moments. Paired t-tests were used to compare the variables of interest before and after pain exacerbation.

Results

Following pain exacerbation, there was a decrease in peak knee extensor moment during stair descent (Effect size = −0.68; p = 0.01) and stair ascent (Effect size = −0.56; p = 0.02); as well as in peak ankle dorsiflexion during stair descent (Effect size = −0.33; p = 0.01) and stair ascent (Effect size = −0.30; p = 0.01). An increase in ankle plantarflexor moment during stair descent (Effect size = 0.79; p < 0.01) and stair ascent (Effect size = 0.89; p < 0.01) was also observed. No significant differences were observed for peak trunk, hip, and knee flexion or hip extensor moment (p > 0.05).

Significance

Our findings show compensatory strategies used by people with PFP in response to symptoms exacerbation that may have a negative impact on knee and ankle mechanics. Our findings also suggest that people with PFP do not seem to change their trunk, hip, and knee flexion or hip extensor moment during stair negotiation in response to symptom exacerbation.

中文翻译：

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楼梯谈判过程中tell股股骨疼痛加重对躯干运动学和下肢力学的影响

背景

尽管假设of股股骨痛（PFP）的存在可能会导致代偿行为，从而改变躯干运动学和下肢力学，但在楼梯谈判期间negotiation股股骨疼痛加重对躯干运动学和下肢力学的影响尚未建立。

研究问题

在楼梯谈判期间，PFP症状的恶化会导致躯干运动学和下肢力学改变吗？

方法

从45名PFP妇女在楼梯下降和上升过程中获得了三维运动学和动力学。在疼痛加剧方案之前和之后获得数据。感兴趣的变量是躯干，髋部和膝盖的最大屈曲度以及踝背屈。髋，膝伸肌和踝plant屈高峰。配对t检验用于比较疼痛加重前后的目标变量。

结果

疼痛加重后，在楼梯下降过程中（效果大小= -0.68； p = 0.01）和楼梯上升过程（效果大小= -0.56; p = 0.02），膝部最大伸肌力矩降低。以及在下降楼梯（效果尺寸= -0.33； p = 0.01）和上升楼梯（效果尺寸= -0.30; p = 0.01）期间的最大踝背屈。在楼梯下降过程中（效果大小= 0.79； p <0.01）和楼梯上升过程中（效果大小= 0.89； p <0.01），踝plant屈力矩增加。躯干峰值，髋部和膝部屈曲或髋部伸肌力矩没有观察到显着差异（p> 0.05）。

意义

我们的研究结果表明，PFP患者使用补偿策略来应对症状加重，这可能会对膝盖和脚踝的力学产生负面影响。我们的研究结果还表明，PFP患者似乎在楼梯协商过程中不会因症状加重而改变其躯干，臀部和膝盖的屈曲或髋部伸伸力矩。