Athletic PerformanceFCJUMPNCT07407478
Effect of Foot Core Exercises on Jump Performance in Professional Volleyball Players
A study testing Strength Training Program and Foot Core Exercise Program in people with Athletic Performance, run by Mudanya University at 1 site in Turkey (Türkiye).
Trial summary
Brief Summary The purpose of this study is to investigate the effect of foot core exercises on jump performance in professional volleyball players. Participants will be randomly assigned to two groups. Read more about this study
- Who is it for?
- Ages 18 to 35 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Athletic Performance
- What is being tested?
- Strength Training Program and Foot Core Exercise Program
- Type of treatment
- Lifestyle or therapy programme
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 43 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- Mar 2026to Jun 2027
- Phase
- Interventional
- Are there results?
- Not yet: the study is under way
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 35 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Male professional volleyball players aged 18 to 35 years
- Actively licensed athletes competing in clubs affiliated with the Turkish Volleyball Federation
- Regular participation in team training sessions without interruption for at least the past 3 months
- No history of surgery or serious injury involving the lower extremities (foot, ankle, knee, or hip) within the last 6 months
- Agreement not to participate in any additional strength, balance, or proprioception-based exercise programs during the study period
- No medical or physiological condition that would prevent participation in the Countermovement Jump (CMJ) test performed using the ForceDecks system
- Voluntary participation with written informed consent obtained prior to enrollment
Who cannot join
- Presence of deformity, chronic pain, or functional impairment in the foot or ankle
- History of lower extremity orthopedic surgery within the past 6 months
- History of neurological or vestibular disorders, or systemic diseases affecting balance
- Participation in physiotherapy interventions, rehabilitation protocols, or exercise programs outside the scope of the study during the study period
Trial locations and contacts
1 site in 1 country. Contact the study team or a site near you to ask about taking part.
Turkey (Türkiye)1 site
Mudanya University
Bursa, Mudanya
Hazal B Yılmaz, PhD, +90 553 444 59 25, hazalberfin.yilmaz@mudanya.edu.tr
About this study
Official title: Effect of Foot Core Exercises on Jump Performance in Professional Volleyball Players: An Objective Evaluation Using ForceDecks
Brief Summary
The purpose of this study is to investigate the effect of foot core exercises on jump performance in professional volleyball players. Participants will be randomly assigned to two groups. The first group will perform a strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Jump performance will be assessed using the Countermovement Jump (CMJ) test, and performance scores will be obtained through force-time analysis using the ForceDecks system. The findings of this study are expected to contribute to the development of training programs aimed at improving performance and reducing injury risk in professional volleyball players.
Read the detailed description
Detailed Description
This study is designed to examine the effects of foot core exercises on jump performance in professional volleyball players. Participants will be divided into two groups: a control group and an intervention group. The control group will follow a standardized strength training program, while the intervention group will perform the same strength training program combined with additional foot core exercises.
Jump performance will be evaluated using the Countermovement Jump (CMJ) test. Kinetic variables derived from force-time data will be collected using the ForceDecks system. Pre- and post-intervention measurements will be compared to determine the effects of the training programs.
The results of this study are expected to provide evidence-based information for designing training programs that enhance athletic performance and help reduce injury risk in professional volleyball players.
- Conditions
- Athletic Performance
- Being tested
- Strength Training Program, Foot Core Exercise Program
- Keywords
- Foot Core Exercise, Jump Performance, Volleyball Players, Countermovement Jump, Force Plates, Athletic Performance
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Strength Training ProgramBehavioural
Description Participants will perform a standardized lower-extremity strength training program routinely used for professional volleyball players.
Arms Assigned
- Strength Training Group
- Strength Training Plus Foot Core Exercises Group
Foot Core Exercise ProgramBehavioural
Description Participants will perform foot core exercises targeting intrinsic and extrinsic foot muscles. The exercises are designed to improve foot stability and functional control.
Arms Assigned ✔️ Strength Training Plus Foot Core Exercises Group
❌ Strength Training Group (işaretleme)
| Study group | Role | What they receive |
|---|---|---|
| Strength Training Group | Active comparator | Description Participants in this group will perform a standardized lower-extremity strength training program routinely used for professional volleyball players. Receives: Behavioral: Strength Training Program |
| Strength Training plus Foot Core Exercise Group | Experimental | Experimental: Strength Training Plus Foot Core Exercises Group
Description Participants in this group will perform the same standardized lower-extremity strength training program in addition to a foot core exercise program targeting intrinsic and extrinsic foot muscles. Receives: Behavioral: Strength Training Program; Behavioral: Foot Core Exercise Program |
What is being measured
The primary outcome is the main question the study is designed to answer.
Vertical Jump Height (Countermovement Jump)
Maximum vertical jump height measured during the Countermovement Jump (CMJ) test.
Measured: Baseline and post-intervention (approximately 8 weeks)
Secondary outcomes (1)
Force-Time Variables During Countermovement Jump
Force-time variables obtained from force platform measurements during the Countermovement Jump (CMJ) test.
Measured: Baseline and post-intervention (approximately 8 weeks)
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted12 Feb 2026
- Study startMar 2026 (estimated)
- Primary completionMar 2027 (estimated)
- Study completionJun 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Athletic PerformanceStudies 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
- Model description
- This study is designed using a parallel assignment model. Participants will be randomly allocated into two groups. The first group will perform a standardized strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Both groups will be followed simultaneously throughout the intervention period.
- Masking
- None (open label)
- Enrolment
- 43 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Mudanya University
- Sponsor type
- University, hospital or other
- Responsible party
- Principal investigator, Hazal Berfin YILMAZ, Mudanya University
- Investigators
- Hazal B Yılmaz, PhD, Principal investigator, Mudanya University
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07407478
- Sponsor's protocol ID
- 2025/222
- Acronym
- FCJUMP
- Status last verified
- Feb 2026
- First submitted
- 3 Jan 2026
- Last updated
- 12 Feb 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No: Individual participant data will not be shared, as this study is conducted as part of a master's thesis with a limited sample size, and data sharing is not covered by the informed consent approved by the ethics committee.
Study at a glance
From the registry record, last updated by the sponsor on 12 Feb 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Effect of Foot Core Exercises on Jump Performance in Professional Volleyball Players: An Objective Evaluation Using ForceDecks
- ClinicalTrials.gov ID
- NCT07407478
- Acronym / sponsor ID
- FCJUMP / 2025/222
- Conditions
- Athletic Performance
- Keywords
- Foot Core Exercise, Jump Performance, Volleyball Players, Countermovement Jump, Force Plates, Athletic Performance
- Study type
- Interventional
- Recruitment status
- Not yet recruiting
- Enrolment
- 43 participants (estimated)
- Lead sponsor
- Mudanya UniversityUniversity, hospital or other
- Study start
- Mar 2026 (estimated)
- Primary completion
- Mar 2027 (estimated)
- Study completion
- Jun 2027 (estimated)
- First posted
- 12 Feb 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.
Brief Summary
The purpose of this study is to investigate the effect of foot core exercises on jump performance in professional volleyball players. Participants will be randomly assigned to two groups. The first group will perform a strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Jump performance will be assessed using the Countermovement Jump (CMJ) test, and performance scores will be obtained through force-time analysis using the ForceDecks system. The findings of this study are expected to contribute to the development of training programs aimed at improving performance and reducing injury risk in professional volleyball players.
Detailed description
Detailed Description
This study is designed to examine the effects of foot core exercises on jump performance in professional volleyball players. Participants will be divided into two groups: a control group and an intervention group. The control group will follow a standardized strength training program, while the intervention group will perform the same strength training program combined with additional foot core exercises.
Jump performance will be evaluated using the Countermovement Jump (CMJ) test. Kinetic variables derived from force-time data will be collected using the ForceDecks system. Pre- and post-intervention measurements will be compared to determine the effects of the training programs.
The results of this study are expected to provide evidence-based information for designing training programs that enhance athletic performance and help reduce injury risk in professional volleyball players.
Study design
- Primary purpose
- Prevention
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- None (open label)
- Number of arms
- 2
- Model description
- This study is designed using a parallel assignment model. Participants will be randomly allocated into two groups. The first group will perform a standardized strength training program only, while the second group will perform foot core exercises in addition to the same strength training program. Both groups will be followed simultaneously throughout the intervention period.
| Arm | Type | Receives |
|---|---|---|
| Strength Training Group | Active comparator | Behavioral: Strength Training ProgramDescription Participants in this group will perform a standardized lower-extremity strength training program routinely used for professional volleyball players. |
| Strength Training plus Foot Core Exercise Group | Experimental | Behavioral: Strength Training Program, Behavioral: Foot Core Exercise ProgramExperimental: Strength Training Plus Foot Core Exercises Group Description Participants in this group will perform the same standardized lower-extremity strength training program in addition to a foot core exercise program targeting intrinsic and extrinsic foot muscles. |
Who may qualify
- Ages
- 18 to 35 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (7 listed)
- Male professional volleyball players aged 18 to 35 years
- Actively licensed athletes competing in clubs affiliated with the Turkish Volleyball Federation
- Regular participation in team training sessions without interruption for at least the past 3 months
- No history of surgery or serious injury involving the lower extremities (foot, ankle, knee, or hip) within the last 6 months
- Agreement not to participate in any additional strength, balance, or proprioception-based exercise programs during the study period
Key exclusion criteria (4 listed)
- Presence of deformity, chronic pain, or functional impairment in the foot or ankle
- History of lower extremity orthopedic surgery within the past 6 months
- History of neurological or vestibular disorders, or systemic diseases affecting balance
- Participation in physiotherapy interventions, rehabilitation protocols, or exercise programs outside the scope of the study during the study period
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 ProgramDescription Participants will perform a standardized lower-extremity strength training program routinely used for professional volleyball players. Arms Assigned * Strength Training Group * Strength Training Plus Foot Core Exercises Group | Behavioural | Strength Training Group, Strength Training plus Foot Core Exercise Group |
| Foot Core Exercise ProgramDescription Participants will perform foot core exercises targeting intrinsic and extrinsic foot muscles. The exercises are designed to improve foot stability and functional control. Arms Assigned ✔️ Strength Training Plus Foot Core Exercises Group ❌ Strength Training Group (işaretleme) | Behavioural | Strength Training plus Foot Core Exercise Group |
Primary outcome
Vertical Jump Height (Countermovement Jump)
Time frame: Baseline and post-intervention (approximately 8 weeks)
Maximum vertical jump height measured during the Countermovement Jump (CMJ) test.
1 secondary outcome
Force-Time Variables During Countermovement Jump
Time frame: Baseline and post-intervention (approximately 8 weeks)
Results and safety
This study is still under way. Results are not available in the source record yet.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 12 Feb 2026.
- Individual participant dataSharing planned: No. Individual participant data will not be shared, as this study is conducted as part of a master's thesis with a limited sample size, and data sharing is not covered by the informed consent approved by the ethics committee.
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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.
Hazal B Yılmaz, PhD principal investigator
Mudanya University
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 and Foot Core Exercise Program in people with Athletic Performance, run by Mudanya 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 7 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: opening soon, as of the sponsor's last update on 12 Feb 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?
This study is still under way. Results are not available in the source record yet.
How can a doctor refer a patient or contact the research team?
Contact Önder Çalışkan, MSc Candidate (+905379125304, fztondercaliskan@outlook.com), or a site near the patient. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Vertical Jump Height (Countermovement Jump) (time frame: Baseline and post-intervention (approximately 8 weeks)). 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 12 Feb 2026.