Knee ValgusNCT07009041
Integrated Training Program On Jump Performance And Knee Valgus In Youth Football Players
A study testing Strength training program, Stretching exercises program and Plyometric exercises program in people with Knee Valgus, run by TC Erciyes University at 1 site in Turkey (Türkiye).
Trial summary
This study aimed to investigate the effects of stretching, strength, and plyometric exercise training programs, applied in addition to regular training, on jumping performance and knee valgus values in football players. Read more about this study
- Who is it for?
- Ages 18 to 19 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Knee Valgus
- What is being tested?
- Strength training program, Stretching exercises program and Plyometric exercises program
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 90 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 15 Sep 2024to 12 Nov 2024
- Phase
- Interventional
- 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 18 to 19 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Being a football player playing in the U-19 football team
- Being a male
- Residing in Kayseri
- Be between 18-19 years old
Who cannot join
- Not being a football player playing on the U-19 football team
- Being a female
- Residence outside Kayseri
- Being outside the 18-19 age range
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Erciyes University
Talas, None Selected, 38280
About this study
Official title: The Effects Of An Integrated Training Program On Jump Performance And Knee Valgus In Youth Football Players: A Controlled Group Study
This study aimed to investigate the effects of stretching, strength, and plyometric exercise training programs, applied in addition to regular training, on jumping performance and knee valgus values in football players.
Read the detailed description
The sample of this study consisted of male football players from an under-19 (U-19) team based in Kayseri, Turkey. The inclusion criteria required participants to be male, aged 18 or older, actively competing in the U-19 category, free from any disabilities, and to have at least five years of experience as licensed football players. In 2024, ninety athletes from an amateur football club were invited to participate in the study. Participants were assigned to experimental and control groups using an unbiased sampling method. Groups were balanced based on pre-test results to ensure equivalence.
A true experimental design was employed, specifically the pre-test-post-test control group model. Jump tests, including the countermovement jump (CMJ), free-arm countermovement jump (CMJFREE), drop jump (DJ), squat jump (SJ), and horizontal jump, were conducted using the My Jump 2 application. The knee valgus test was performed using the My Jump Lab application, which enables markerless motion analysis by evaluating images recorded by a mobile device. This application provides valuable insights into injury prevention particularly in the lower extremities and supports the assessment of proper execution of technical movements.
The training program included strength, flexibility, and plyometric exercises, designed to reduce muscle strength imbalances while enhancing flexibility and plyometric performance. Since improvements in motor characteristics and muscle balance are expected to positively affect knee valgus angles, all components of the training program were implemented in combination. Strength training was carried out over eight weeks and included full-body, core, and lower extremity exercises. In addition, the anterior cruciate ligament injury prevention program developed by Hewett et al., which emphasizes plyometric training, was incorporated during the first six weeks in accordance with its prescribed duration. Stretching exercises were performed following strength training sessions throughout the entire eight-week period. The training program was administered exclusively to the experimental group and followed a consistent schedule and sequence. Training sessions were conducted three times per week for eight weeks, separate from routine football practices. Plyometric exercises were included once per week, and a minimum one-day rest interval was maintained between sessions.
Data were analyzed using SPSS version 27. The Kolmogorov-Smirnov test was used to assess the normality of data distribution. Repeated Measures Analysis of Variance (ANOVA) was applied for within-subject comparisons, while the Bonferroni test was used to determine the source of significant differences. Between-group comparisons were conducted using the Independent Samples t-test.
- Conditions
- Knee Valgus
- Being tested
- Strength training program, Stretching exercises program, Plyometric exercises program, Demographic tests, Jump tests
- Keywords
- Football, jump performance, anterior cruciate ligament, knee valgus, injury prevention, exercise training program
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Strength training programOther
Strength training was implemented for eight weeks, including full-body, core, and leg exercises.
Stretching exercises programOther
Stretching exercises were performed after strength training for the entire eight-week period. The training was administered exclusively to participants in the experimental group, following a consistent schedule and sequence. The program was conducted three days a week for eight weeks, separate from regular football training.
Plyometric exercises programOther
Plyometric exercises were included only one day per week, and a minimum one-day rest period was maintained between training sessions.Since this program was originally 6 weeks long, it was implemented in the first 6 weeks of the study's implementation process.
Demographic testsDiagnostic test
Demographic tests were applied to determine the height, weight and BMI values for the identification of the participants.
Jump testsDiagnostic test
Jump tests (CMJ, CMJ Free, SJ, DJ, Horizontal Jump). Three different measurements were taken at three different times.(Before starting, end of week 4 and after completion of week 8).
Knee Valgus testsDiagnostic test
It was conducted to determine the right and left knee valgus values of the participants.Three different measurements were taken at three different times. (Before starting, end of week 4 and after completion of week 8).
| Study group | Role | What they receive |
|---|---|---|
| Experimental Group | Experimental | The group that received 8-week training programs Receives: Other: Strength training program; Other: Stretching exercises program; Other: Plyometric exercises program; Diagnostic Test: Demographic tests; Diagnostic Test: Jump tests; Diagnostic Test: Knee Valgus tests |
| Control Group | Other | Group without any intervention Receives: Diagnostic Test: Demographic tests; Diagnostic Test: Jump tests; Diagnostic Test: Knee Valgus tests |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in Countermovement Jump Height (CMJ) Measured in Centimeters
CMJ test was performed using the My Jump 2 app. The jump height (in cm) was recorded in 3 separate measurements and the average was used for comparison.Unit of Measure: Centimeters (cm)
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Change in Free Arm Countermovement Jump Height (CMJFREE) Measured in Centimeters
CMJFREE test was performed using the My Jump 2 app with free arm movement. Values were averaged from 3 trials.Unit of Measure: Centimeters (cm)
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Change in Drop Jump Height (DJ) Measured in Centimeters
DJ test was performed using the My Jump 2 app. Jump height (cm) was measured and averaged across 3 attempts.Unit of Measure: Centimeters (cm).
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Change in Squat Jump Height (SJ) Measured in Centimeters
SJ test was performed using the My Jump 2 app. Jump height (cm) was measured and averaged across 3 trials.Unit of Measure: Centimeters (cm)
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Change in Horizontal Jump Distance Measured in Centimeters
Horizontal jump test was performed manually. Jump distance (cm) was recorded and averaged across 3 trials.Unit of Measure: Centimeters (cm)
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Change in Knee Valgus Angle Measured in Degrees
Knee valgus angle was assessed using the My Jump Lab app. Degree values were measured from 3 trials and averaged for each time point.
Measured: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted6 Jun 2025
- Study start15 Sep 2024
- Primary completion15 Sep 2024
- Study completion12 Nov 2024
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Publications (1)Papers the sponsor has linked to this study.
- Other trials for Knee ValgusStudies of the same condition, open and under way.
- 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
- Interventional
- Phase
- Phase N/A
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Enrolment
- 90 participants (actual)
Sponsor and investigators
- Lead sponsor
- TC Erciyes University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Vesile Şahiner Güler, TC Erciyes University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07009041
- Sponsor's protocol ID
- ERU-SAGENS-VSG-01
- Status last verified
- May 2025
- First submitted
- 14 May 2025
- Last updated
- 6 Jun 2025
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Undecided
Publications
Turan MB, Pekel A, Guler VS, Kurt MA, Pepe O, Polat Y. The effects of an integrated training program on jump performance and knee valgus in youth football players: a randomised controlled group study. BMC Sports Sci Med Rehabil. 2025 Jul 28;17(1):216. doi: 10.1186/s13102-025-01266-4.
PubMed 40721808
Study at a glance
From the registry record, last updated by the sponsor on 6 Jun 2025. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- The Effects Of An Integrated Training Program On Jump Performance And Knee Valgus In Youth Football Players: A Controlled Group Study
- ClinicalTrials.gov ID
- NCT07009041
- Acronym / sponsor ID
- ERU-SAGENS-VSG-01
- Conditions
- Knee Valgus
- Keywords
- Football, jump performance, anterior cruciate ligament, knee valgus, injury prevention, exercise training program
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 90 participants (actual)
- Lead sponsor
- TC Erciyes UniversityUniversity, hospital or other
- Study start
- 15 Sep 2024 (actual)
- Primary completion
- 15 Sep 2024 (actual)
- Study completion
- 12 Nov 2024 (actual)
- First posted
- 6 Jun 2025 (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.
This study aimed to investigate the effects of stretching, strength, and plyometric exercise training programs, applied in addition to regular training, on jumping performance and knee valgus values in football players.
Detailed description
The sample of this study consisted of male football players from an under-19 (U-19) team based in Kayseri, Turkey. The inclusion criteria required participants to be male, aged 18 or older, actively competing in the U-19 category, free from any disabilities, and to have at least five years of experience as licensed football players. In 2024, ninety athletes from an amateur football club were invited to participate in the study. Participants were assigned to experimental and control groups using an unbiased sampling method. Groups were balanced based on pre-test results to ensure equivalence.
A true experimental design was employed, specifically the pre-test-post-test control group model. Jump tests, including the countermovement jump (CMJ), free-arm countermovement jump (CMJFREE), drop jump (DJ), squat jump (SJ), and horizontal jump, were conducted using the My Jump 2 application. The knee valgus test was performed using the My Jump Lab application, which enables markerless motion analysis by evaluating images recorded by a mobile device. This application provides valuable insights into injury prevention particularly in the lower extremities and supports the assessment of proper execution of technical movements.
The training program included strength, flexibility, and plyometric exercises, designed to reduce muscle strength imbalances while enhancing flexibility and plyometric performance. Since improvements in motor characteristics and muscle balance are expected to positively affect knee valgus angles, all components of the training program were implemented in combination. Strength training was carried out over eight weeks and included full-body, core, and lower extremity exercises. In addition, the anterior cruciate ligament injury prevention program developed by Hewett et al., which emphasizes plyometric training, was incorporated during the first six weeks in accordance with its prescribed duration. Stretching exercises were performed following strength training sessions throughout the entire eight-week period. The training program was administered exclusively to the experimental group and followed a consistent schedule and sequence. Training sessions were conducted three times per week for eight weeks, separate from routine football practices. Plyometric exercises were included once per week, and a minimum one-day rest interval was maintained between sessions.
Data were analyzed using SPSS version 27. The Kolmogorov-Smirnov test was used to assess the normality of data distribution. Repeated Measures Analysis of Variance (ANOVA) was applied for within-subject comparisons, while the Bonferroni test was used to determine the source of significant differences. Between-group comparisons were conducted using the Independent Samples t-test.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Experimental Group | Experimental | Other: Strength training program, Other: Stretching exercises program, Other: Plyometric exercises program, Diagnostic Test: Demographic tests, Diagnostic Test: Jump tests, Diagnostic Test: Knee Valgus testsThe group that received 8-week training programs |
| Control Group | Other | Diagnostic Test: Demographic tests, Diagnostic Test: Jump tests, Diagnostic Test: Knee Valgus testsGroup without any intervention |
Who may qualify
- Ages
- 18 to 19 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (4 listed)
- Being a football player playing in the U-19 football team
- Being a male
- Residing in Kayseri
- Be between 18-19 years old
Key exclusion criteria (4 listed)
- Not being a football player playing on the U-19 football team
- Being a female
- Residence outside Kayseri
- Being outside the 18-19 age range
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Strength training programStrength training was implemented for eight weeks, including full-body, core, and leg exercises. | Other | Experimental Group |
| Stretching exercises programStretching exercises were performed after strength training for the entire eight-week period. The training was administered exclusively to participants in the experimental group, following a consistent schedule and sequence. The program was conducted three days a week for eight weeks, separate from regular football training. | Other | Experimental Group |
| Plyometric exercises programPlyometric exercises were included only one day per week, and a minimum one-day rest period was maintained between training sessions.Since this program was originally 6 weeks long, it was implemented in the first 6 weeks of the study's implementation process. | Other | Experimental Group |
| Demographic testsDemographic tests were applied to determine the height, weight and BMI values for the identification of the participants. | Diagnostic test | Control Group, Experimental Group |
| Jump testsJump tests (CMJ, CMJ Free, SJ, DJ, Horizontal Jump). Three different measurements were taken at three different times.(Before starting, end of week 4 and after completion of week 8). | Diagnostic test | Control Group, Experimental Group |
| Knee Valgus testsIt was conducted to determine the right and left knee valgus values of the participants.Three different measurements were taken at three different times. (Before starting, end of week 4 and after completion of week 8). | Diagnostic test | Control Group, Experimental Group |
Primary outcome
Change in Countermovement Jump Height (CMJ) Measured in Centimeters
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
CMJ test was performed using the My Jump 2 app. The jump height (in cm) was recorded in 3 separate measurements and the average was used for comparison.Unit of Measure: Centimeters (cm)
Change in Free Arm Countermovement Jump Height (CMJFREE) Measured in Centimeters
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
CMJFREE test was performed using the My Jump 2 app with free arm movement. Values were averaged from 3 trials.Unit of Measure: Centimeters (cm)
Change in Drop Jump Height (DJ) Measured in Centimeters
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
DJ test was performed using the My Jump 2 app. Jump height (cm) was measured and averaged across 3 attempts.Unit of Measure: Centimeters (cm).
Change in Squat Jump Height (SJ) Measured in Centimeters
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
SJ test was performed using the My Jump 2 app. Jump height (cm) was measured and averaged across 3 trials.Unit of Measure: Centimeters (cm)
Change in Horizontal Jump Distance Measured in Centimeters
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Horizontal jump test was performed manually. Jump distance (cm) was recorded and averaged across 3 trials.Unit of Measure: Centimeters (cm)
Change in Knee Valgus Angle Measured in Degrees
Time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.
Knee valgus angle was assessed using the My Jump Lab app. Degree values were measured from 3 trials and averaged for each time point.
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 6 Jun 2025.
- Derived from this study: PubMed 40721808Turan MB, Pekel A, Guler VS, Kurt MA, Pepe O, Polat Y. The effects of an integrated training program on jump performance and knee valgus in youth football players: a randomised controlled group study. BMC Sports Sci Med Rehabil. 2025 Jul 28;17(1):216. doi: 10.1186/s13102-025-01266-4.
- Individual participant dataSharing planned: 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?
A study testing Strength training program, Stretching exercises program and Plyometric exercises program in people with Knee Valgus, run by TC Erciyes 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 4 inclusion and 4 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 6 Jun 2025. 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 in Countermovement Jump Height (CMJ) Measured in Centimeters (time frame: Each participant in the study was evaluated by taking 3 separate measurements before starting the study, at the end of the 4th week of the study, and at the end of the 8th week of the study. The total evaluation process was completed within 8 weeks.). The study lists 6 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
On the ClinicalTrials.gov record for NCT07009041, which also lists 1 linked publication.
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 6 Jun 2025.