Background

Elevated patellofemoral joint forces appear to contribute to the development of patellofemoral pain. As a result, treatment of patellofemoral pain often includes movement retraining intended to reduce patellofemoral joint forces. Real-time visual feedback has been shown to be effective for retraining running kinematics; however, we are not aware of a previous study that has examined the influence of real-time visual feedback on patellofemoral joint mechanics during a squat.

Methods

Twenty individuals with patellofemoral pain completed squats before (baseline) and immediately after (post-feedback) completing a real-time visual feedback training session. During the session, participants received visual feedback related to their patellofemoral joint forces (estimated via a musculoskeletal model) during squatting and were asked to alter their movement pattern to minimize these forces. Patellofemoral joint forces and hip, knee, and ankle joint mechanics were compared for the baseline and post-feedback trials in order to examine how feedback influenced squat performance.

Findings

Participants demonstrated a 14.4% reduction in patellofemoral joint forces following the feedback session. They appeared to achieve this reduction in patellofemoral joint forces by squatting with less knee flexion (97.26 ± 17.11° vs. 102.96 ± 16.55°) and lower knee extension moments (0.10 ± 0.02 Nm/bodyweight vs. 0.11 ± 0.02 Nm/bodyweight) and quadriceps forces (4.06 ± 0.87 bodyweights vs. 4.67 ± 0.98 bodyweights).

Interpretation

Real-time visual feedback appears to be effective for reducing patellofemoral joint forces during squatting in individuals with patellofemoral pain. As a result, training of this nature may be beneficial when treating patellofemoral pain.

中文翻译：

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实时视觉反馈可减少pa股疼痛患者在蹲期间during股关节的力量。

背景

pa股关节力量升高似乎有助于pa股疼痛的发展。结果，treatment股疼痛的治疗通常包括旨在减少pa股关节力的运动再训练。实时视觉反馈已被证明对运动学的再训练是有效的。但是，我们尚不了解先前的研究，该研究研究了蹲下过程中实时视觉反馈对pa股关节力学的影响。

方法

二十名pa股疼痛患者在完成实时视觉反馈训练之前（基线）和之后（反馈后）立即下蹲。在会议期间，参与者在下蹲期间收到有关to股关节力量的视觉反馈（通过肌肉骨骼模型估算），并要求他们改变运动方式以最小化这些力量。比较基线和反馈后试验的股关节力量以及髋，膝和踝关节力学，以检查反馈如何影响下蹲性能。

发现

参加者在反馈会后表现出pa股关节力下降了14.4％。他们似乎通过蹲坐实现了this股关节力的减少，膝关节屈曲较少（97.26±17.11°vs. 102.96±16.55°），膝关节伸展力矩较低（0.10±0.02 Nm /体重vs. 0.11±0.02 Nm /体重），并且股四头肌力量（4.06±0.87体重vs. 4.67±0.98体重）。

解释

实时视觉反馈对于减少pa股疼痛患者的股关节力量似乎是有效的。结果，这种性质的训练在治疗pa股股骨痛时可能是有益的。