Background: 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. Hypothesis:
Quadriceps flexibility and strength, muscle activation time, and patient-reported outcomes …