This cross-sectional observational study investigated the relationships among dynamic Q angle, core muscle endurance, hip flexibility, and lower extremity functional status in elite adolescent athletes with and without patellofemoral pain syndrome (PFPS). A total of 75 track-and-field athletes aged 15-18 years were included, 42 with PFPS and 33 healthy controls. Dynamic Q angle was assessed using a digital goniometric analysis of the step-down test, core endurance was measured with the McGill endurance tests, flexibility was evaluated using the Straight Leg Raise, Modified Thomas, and Ober tests, and functional status was assessed with the Lower Extremity Functional Scale (LEFS). The study found that athletes with PFPS demonstrated a higher dynamic Q angle, lower core extension and lateral endurance, reduced hip flexor and iliotibial band flexibility, and lower functional scores compared with controls. Regression analyses indicated that hip flexor tightness and functional capacity were significant predictors of the dynamic Q angle in the PFPS group. These findings suggest that PFPS in adolescent athletes is a multidimensional condition influenced by proximal endurance, flexibility, and dynamic alignment rather than isolated knee-level factors.
See this in plain English?
AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.
Dynamic Q Angle
Timeframe: Single assessment at baseline (cross-sectional).
Core Muscle Endurance - Extension Test
Timeframe: Single assessment at baseline.
Hip Flexor Flexibility - Modified Thomas Test
Timeframe: Baseline, single assessment.
Core Muscle Endurance - Lateral Plank Test
Timeframe: Single assessment at baseline.
Iliotibial Band / TFL Flexibility - Ober Test
Timeframe: Baseline, single assessment.
Hamstring Flexibility - Straight Leg Raise Test
Timeframe: Single assessment at baseline.
Functional Status - Lower Extremity Functional Scale (LEFS)
Timeframe: Baseline, single assessment.