This study aims to investigate the relationship between knee joint range of motion and pain in patients with patellofemoral pain syndrome (PFPS). In a cross-sectional observational design, PFPS patients will perform trials involving progressively increased knee joint range of motion in three closed-chain exercises: squat, single-leg squat, and split squat. During each trial, participants will report pain levels on a 0-10 Visual Analog Scale (VAS) until either (1) achieving full depth in the respective exercise or (2) reaching a pain level of \>5 on the VAS.
Patients diagnosed with PFP in only one knee by a licensed healthcare professional.
Aged 15-35 years.
A physical activity level of 3/10 or higher on the Tegner Activity Scale before the injury.
Any prior injury or condition with residual symptoms that may affect the results.
Current injury or condition affecting the performance of the test.
Resting pain greater than 0-1/10 on the Numeric Pain Rating Scale (NRS) and pain greater than 1-2/10 during light daily activities such as walking, sitting, standing, or climbing stairs.
This project will include patients diagnosed with PFP (ICD-10: M22.2).
Case-only
Cross-sectional
Exercise
Other interventionExercise with progressively increased range of motion.
Pain (VAS)
Pain measured 0-10 visual analog scale (VAS) reported during each trial of progressively increased range of motion during a single session.
Range of motion
Degrees of knee flexion measured during each trial in one single session.
Force
Force (N) (peak value) reported during the different trials in one session. Measured by force plates.
Tegner Activity Scale (TAS)
The Tegner Activity Scale (TAS) will be used to assess the physical activity levels of the participants. Scale from 1-10 where 10 is highest possible physical activity and 1 is sedentary.
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Ted Gunhamn
Lead sponsor
Linnaeus University
Sponsor institution
