Genu VarumNCT07798869
Genu Varum, Change of Direction, and Reactive Agility in Youth Football Players
An observational study of Genu Varum, run by Akdeniz University at 1 site in Turkey (Türkiye).
Trial 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. Read more about this study
- Who is it for?
- Ages 13 to 19 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Genu Varum
- How many people
- 34 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 1 Mar 2025to 12 Jun 2025
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 13 to 19 years
- Men only
- Healthy volunteers accepted
- Child, Adult
Study population: The study population consisted of male youth football players recruited from the academy of a professional football club based in Antalya, Türkiye. The football club competes in the Turkish Süper Lig, the highest tier of professional football in Türkiye.
Who may be able to join
- At least five years of football experience
- Participation in football training at least five days per week
- Voluntary participation in the study
Who cannot join
- History of lower extremity surgery
- Current musculoskeletal injury affecting performance
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Does Genu Varum Influence Change of Direction and Reactive Agility Performance in Youth Football Players?
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:
Read more
- Do football players with and without genu varum differ in COD and RA performance?
- 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.
- Conditions
- Genu Varum
- Keywords
- Genu varum, Lower-limb alignment, Football players, Soccer players, Change of direction, Knee alignment, Lower extremity alignment
- Medical subject headings
- Genu Varum
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
| Study group | Role | What they receive |
|---|---|---|
| Genu Varum Group | Football players with genu varum who will be assessed for lower-limb alignment, change-of-direction performance, and reactive agility performance. | |
| Control Group | Football players without genu varum who will be assessed for lower-limb alignment, change-of-direction performance, and reactive agility performance. |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change-of-direction performance
Change-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.
Measured: at basline
Reactive agility performance
Reactive 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.
Measured: at basline
Secondary outcomes (1)
Intercondylar distance and intermalleolar distance
Lower-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.
Measured: at basline
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted1 Sep 2026
- Study start1 Mar 2025
- Primary completion1 Jun 2025
- Study completion12 Jun 2025
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Genu VarumStudies of the same condition, open and under way.
- More trials run by Akdeniz UniversityThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 34 participants (actual)
Sponsor and investigators
- Lead sponsor
- Akdeniz University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07798869
- Sponsor's protocol ID
- 2025-89
- Status last verified
- Aug 2026
- First submitted
- 28 Aug 2026
- Last updated
- 3 Sep 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided: Undecided
Study at a glance
From the registry record, last updated by the sponsor on 3 Sep 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Does Genu Varum Influence Change of Direction and Reactive Agility Performance in Youth Football Players?
- ClinicalTrials.gov ID
- NCT07798869
- Acronym / sponsor ID
- 2025-89
- Conditions
- Genu Varum
- Keywords
- Genu varum, Lower-limb alignment, Football players, Soccer players, Change of direction, Knee alignment, Lower extremity alignment
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 34 participants (actual)
- Lead sponsor
- Akdeniz UniversityUniversity, hospital or other
- Study start
- 1 Mar 2025 (actual)
- Primary completion
- 1 Jun 2025 (actual)
- Study completion
- 12 Jun 2025 (actual)
- First posted
- 1 Sep 2026 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
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:
- Do football players with and without genu varum differ in COD and RA performance?
- 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.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Genu Varum Group | – | –Football players with genu varum who will be assessed for lower-limb alignment, change-of-direction performance, and reactive agility performance. |
| Control Group | – | –Football players without genu varum who will be assessed for lower-limb alignment, change-of-direction performance, and reactive agility performance. |
Who may qualify
- Ages
- 13 to 19 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
- Study population
- The study population consisted of male youth football players recruited from the academy of a professional football club based in Antalya, Türkiye. The football club competes in the Turkish Süper Lig, the highest tier of professional football in Türkiye.
Key inclusion criteria (3 listed)
- At least five years of football experience
- Participation in football training at least five days per week
- Voluntary participation in the study
Key exclusion criteria (2 listed)
- History of lower extremity surgery
- Current musculoskeletal injury affecting performance
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Change-of-direction performance
Time frame: at basline
Change-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 performance
Time frame: at basline
Reactive 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.
1 secondary outcome
Intercondylar distance and intermalleolar distance
Time frame: at basline
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 3 Sep 2026.
- Individual participant dataSharing planned: Undecided. Undecided
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
An observational study of Genu Varum, run by Akdeniz University at 1 site in Turkey (Türkiye).
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 3 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 3 Sep 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in Turkey (Türkiye). Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change-of-direction performance (time frame: at basline). The study lists 2 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 3 Sep 2026.