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Genu Varum, Change of Direction, and Reactive Agility in Youth Football Players

Does Genu Varum Influence Change of Direction and Reactive Agility Performance in Youth Football Players?

Status
Completed
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07798869
Enrollment
34
Registered
2026-09-01
Start date
2025-03-01
Completion date
2025-06-12
Last updated
2026-09-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Genu Varum

Keywords

Genu varum, Lower-limb alignment, Football players, Soccer players, Change of direction, Knee alignment, Lower extremity alignment

Brief summary

The goal of this observational study is to compare change-of-direction (COD) and reactive agility (RA) performance between football players with and without genu varum and to examine whether lower-limb alignment is associated with these performance measures. The main questions it aims to answer are: 1. Do football players with and without genu varum differ in COD and RA performance? 2. Is lower-limb alignment associated with COD and RA performance in football players with and without genu varum? Football players with and without genu varum will undergo assessments of lower-limb alignment, COD performance, and RA performance. The study will compare performance between the two groups and examine the relationship between lower-limb alignment and performance measures.

Interventions

None listed

Sponsors

Akdeniz University
Lead SponsorOTHER

Study design

Observational model
OTHER
Time perspective
CROSS_SECTIONAL

Eligibility

Sex/Gender
MALE
Age
13 Years to 19 Years
Healthy volunteers
Yes

Inclusion criteria

* At least five years of football experience * Participation in football training at least five days per week * Voluntary participation in the study

Exclusion criteria

* History of lower extremity surgery * Current musculoskeletal injury affecting performance

Design outcomes

Primary

MeasureTime frameDescription
Change-of-direction performanceat baslineChange-of-direction performance will be assessed using the SpeedCourt system (Globalspeed GmbH, Hemsbach, Germany). The test consists of a 14.5-m running course with four changes of direction. Performance will be evaluated based on total completion time, with lower times indicating better change-of-direction performance.
Reactive agility performanceat baslineReactive agility performance will be assessed using the SpeedCourt system (Globalspeed GmbH, Hemsbach, Germany). Participants will respond as quickly and accurately as possible to randomly presented visual stimuli and perform the required directional movements. Performance will be evaluated based on total completion time, with lower times indicating better reactive agility performance.

Secondary

MeasureTime frameDescription
Intercondylar distance and intermalleolar distanceat baslineLower-limb alignment will be assessed by measuring intercondylar distance (ICD) and intermalleolar distance (IMD) in centimeters. ICD will be measured as the distance between the medial femoral condyles, and IMD as the distance between the medial malleoli, using a standardized measurement procedure.

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 4, 2026