An interventional study of Structured Corrective Exercise Program in Genu Valgum, Biomechanical Phenomena and Athletic Injuries, sponsored by Istanbul Gelisim University. Completed at 1 site in Turkey (Türkiye). Open to female participants aged 14 Years to 17 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2026-05-11.
Sponsored by Istanbul Gelisim University · Not applicable, Interventional, and Prevention
This study examines the effects of an 8-week structured corrective exercise program on Q angle and jump-landing mechanics (evaluated via the Landing Error Scoring System - LESS) in competitive young female volleyball players during their in-season period. Twenty-three athletes were assigned to either an experimental group receiving corrective exercises or a control group maintaining standard training. The primary goal is to determine if targeted biomechanical corrections can improve knee alignment and movement quality to mitigate injury risks.
The intervention consists of a specialized corrective exercise program focused on body segment alignment and injury risk mitigation, performed over an 8-week duration. Assessments were conducted pre- and post-intervention, including:
Static Q angle measurements.
Biomechanical analysis using the Landing Error Scoring System (LESS).
Countermovement jump (CMJ) height to evaluate explosive power.
The study analyzes whether integrating these exercises into in-season training effectively reduces the Q angle and improves jump-landing mechanics compared to a control group performing only standard volleyball training.
Licensed young female volleyball players.
Aged between 14 and 17 years.
Willingness to participate voluntarily with parental and athlete consent.
Exclusion Criteria:
History of major lower extremity injuries or orthopedic surgery.
Presence of any musculoskeletal or neurological condition that prevents participation in the exercise program.
Lack of regular attendance at volleyball training sessions.
Young female volleyball players (n=12) who participated in an 8-week structured corrective exercise program during the in-season period, in addition to their standard volleyball training
Behavioral: Structured Corrective Exercise Program
Young female volleyball players (n=11) who continued their standard volleyball training during the 8-week study period without participating in any corrective exercise protocol.
The corrective exercise program was implemented 3 times per week for 8 weeks during the in-season period. The protocol focused on optimizing lower extremity alignment, improving neuromuscular control, and correcting faulty jump-landing patterns. Key components included exercises targeting body segment alignment, specific drills to reduce the Q angle, and neuromuscular training to enhance Landing Error Scoring System (LESS) scores. All sessions were integrated into the athletes' regular volleyball training schedule to ensure proper kinetic chain integration and injury risk mitigation.
Static Q Angle
The measurement of the angle between the quadriceps muscle and the patellar tendon to assess lower extremity alignment.
Time frame: Baseline and at the end of the 8-week intervention.
Landing Error Scoring System (LESS) Score
A clinical tool used to assess jump-landing mechanics through video analysis.
Time frame: Baseline and post-intervention (8 weeks).
Countermovement Jump (CMJ) Height
Measurement of vertical jump height to evaluate explosive power.
Time frame: Baseline and post-intervention (8 weeks).
Plan to share: Yes — Individual participant data that underlie the results reported in this article, after de-identification, will be available from the corresponding author on reasonable request.
Supporting information: Study protocol, Sap, Icf
No publications or documents are linked to this record.
This study is completed, as verified in May 2026. You cannot join it, but the record below documents what was studied.
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Genu Valgum
Istanbul Gelisim University