Does the static Q angle reflect dynamic landing mechanics?

Area of Science:

• Biomechanics
• Sports Medicine
• Orthopedics

Background:

• Investigating factors influencing dynamic landing mechanics in young female athletes is crucial for injury prevention.
• Static quadriceps angle (Q-angle) and body composition are potential contributors to altered landing strategies.

Purpose of the Study:

• To examine the relationship between static Q-angle, body composition, and dynamic landing mechanics in female athletes.
• To determine if static Q-angle can predict high-risk landing patterns.

Main Methods:

• Twenty-four female athletes underwent assessment of body composition and static Q-angle.
• Dynamic landing mechanics were evaluated using drop vertical jumps, capturing frontal plane projection angle (FPPA) and Landing Error Scoring System (LESS) scores.
• Motion analysis software (Kinovea) and high-speed cameras were utilized.

Main Results:

• A significant negative correlation was observed between the right Q-angle and both right and left FPPA, indicating less knee valgus with a larger Q-angle.
• Higher body fat percentage was significantly correlated with higher LESS scores, suggesting poorer overall movement quality.
• A potential Q-angle threshold for identifying high-risk landings was explored but did not reach statistical significance.

Conclusions:

• The static Q-angle shows a preliminary association with dynamic knee valgus but is not a reliable standalone screening tool for landing mechanics.
• Elevated body fat percentage appears to independently degrade overall movement quality during landing.
• Further research is needed to establish definitive screening tools for dynamic landing performance in athletes.