THE EFFECT OF CORRECTIVE EXERCISES ON Q ANGLE AND JUMP-LANDING MECHANICS

NCT07578701 | Completed

• 1 other identifier: GOKAEK-2022/21.16
• Study Type: interventional
• Target: 23
• Locations: 1 country
• Sites: 1

Brief Summary

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.

Conditions

Genu Valgum; Biomechanical Phenomena; Athletic Injuries; Knee Injuries

Keywords

Volleyball; Q Angle; Landing; Corrective Exercises; Jump

Outcome Measures

Primary Outcomes (3)

• Static Q Angle

  The measurement of the angle between the quadriceps muscle and the patellar tendon to assess lower extremity alignment.

  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.

  Baseline and post-intervention (8 weeks).

• Countermovement Jump (CMJ) Height

  Measurement of vertical jump height to evaluate explosive power.

  Baseline and post-intervention (8 weeks).

Study Arms (2)

Experimental Group

EXPERIMENTAL

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

Control Group

NO INTERVENTION

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.

Interventions

Structured Corrective Exercise Program BEHAVIORAL

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.

Experimental Group

Eligibility Criteria

• Age: 14 Years - 17 Years
• Sex: female
• Healthy Volunteers: Yes
• Age Groups: Child (0-17)

You may qualify if:

• Licensed young female volleyball players.
• Aged between 14 and 17 years.
• Willingness to participate voluntarily with parental and athlete consent.

You may not qualify if:

• 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.

Sponsors & Collaborators

• Istanbul Gelisim University: lead

Study Sites (1)

Istanbul Gelisim University, Faculty of Sport Sciences

Istanbul, 34310, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Genu Valgum; Athletic Injuries; Knee Injuries

Condition Hierarchy (Ancestors)

Bone Diseases; Musculoskeletal Diseases; Wounds and Injuries; Leg Injuries

Study Officials

• Burak TAŞ, PhD

  Istanbul Gelisim University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: PREVENTION
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: SPONSOR

Study Record Dates

• First Submitted: May 5, 2026
• First Posted: May 11, 2026
• Study Start: February 20, 2023
• Primary Completion: May 10, 2024
• Study Completion: June 15, 2024
• Last Updated: May 11, 2026

Record last verified: 2026-05

Data Sharing

• IPD Sharing: Will share
• Shared Documents: STUDY PROTOCOL, SAP, ICF
• Time Frame: Data will be available beginning 6 months after publication and ending 3 years after publication.
• Access Criteria: De-identified individual participant data will be available to researchers who provide a methodologically sound proposal for use in achieving the goals of the approved proposal. Proposals should be directed to btas@gelisim.edu.tr. To gain access, data requestors will need to sign a data access agreement.

Locations

TU (1)