Does the static Q angle reflect dynamic landing mechanics?
BMC Sports Science, Medicine and Rehabilitation, cilt.18, sa.1, 2026 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 18 Sayı: 1
- Basım Tarihi: 2026
- Doi Numarası: 10.1186/s13102-026-01886-4
- Dergi Adı: BMC Sports Science, Medicine and Rehabilitation
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, EMBASE, SportDiscus, Directory of Open Access Journals, Health Research Premium Collection (ProQuest)
- Anahtar Kelimeler: Anterior cruciate ligament, Body composition, Injury risk, Kinematic analysis, Knee valgus
- İstanbul Gelişim Üniversitesi Adresli: Evet
Özet
Background: This study investigated the effects of static quadriceps angle (Q-angle) and body composition on dynamic landing mechanics in young female athletes. Methods: Twenty-four right-limb dominant female athletes (age: 17.04 ± 0.36 years, BMI: 20.65 ± 2.62) participated. Body composition was assessed via bioelectrical impedance. Static Q-angle, frontal plane projection angle (FPPA), and Landing Error Scoring System (LESS) scores during a drop vertical jump were analyzed using 120 fps cameras and Kinovea software. Results: Correlation analysis revealed significant negative relationships between right Q-angle and both right FPPA (rho = -0.440, p =.031) and left FPPA (rho = -0.490, p =.015). A significant positive correlation was found between body fat percentage and LESS scores (r =.521, p =.009). The regression model explained 22.6% of variance in right FPPA, showing a near-significant exploratory trend for right Q-angle (beta = -0.394, p =.060). ROC analysis suggested a potential, exploratory threshold value of 15.00 degrees for right Q-angle to detect high-risk landing mechanics (LESS > 6), yielding 78.6% sensitivity and 60.0% specificity, although the model did not reach formal statistical significance (p =.143). Conclusions: While the static Q-angle demonstrates a preliminary correlation with dynamic knee valgus tendencies in the dominant limb, non-significant predictive models prevent its use as a definitive standalone screening tool at this stage. Conversely, an elevated body fat percentage independently impairs overall movement quality rather than altering specific frontal plane joint angles. Trial registration: Not applicable.