Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in SwimmersNCT07621913
Comparison of Lower Extremity Parameters in Monofin and Bi-fin Swimmers.
An observational study of Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in Swimmers, run by Istanbul Gelisim University at 1 site in Turkey (Türkiye).
Trial summary
The purpose of this study is to compare the leg muscle features and joint movements of swimmers who use a single large fin (monofin) versus those who use two fins (bi-fins). Different types of fins change how legs move in the water. This may affect the muscle structure and swimming performance. Read more about this study
- Who is it for?
- Ages 12 to 18 yearsHealthy volunteers can take part
- Conditions the study is for
- Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in Swimmers
- What is being tested?
- Measuring of the biomechanical properties of muscles with MyotonPro, Measurement of the length of the lower extremity with a tape measure. and Measuring the range of motion of the lower extremity joints with a digital goniometer
- Type of treatment
- Medical device
- How many people
- 42 participants
- Where
- 1 siteTurkey (Türkiye)
- Study dates
- 2 May 2026to 30 Jun 2026
- Phase
- Observational
- 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 12 to 18 years
- All sexes
- Healthy volunteers accepted
- Child, Adult
Study population: Young healthy swimmers
Who may be able to join
- Being between 12-18 years old
- Having been involved in at least one swimming style for at least 3 years
- Having participated in at least one competition
- Obtaining parental consent. Obtaining parental consent.
Who cannot join
- - Having undergone any surgery on the shoulder girdle muscles.
- Having any orthopedic or physical disorder in the shoulder girdle muscles (e.g., frozen shoulder).
- Participating in another sport besides swimming.
Trial locations and contacts
1 site in 1 country.
Turkey (Türkiye)1 site
Istanbul Gelisim University
Istanbul, Avcılar, 34310
About this study
Official title: Comparison of Lower Extremity Muscle Biomechanical Properties, Joint Range of Motion, and Performance Parameters in Monofin and Bi-fin Swimmers
The purpose of this study is to compare the leg muscle features and joint movements of swimmers who use a single large fin (monofin) versus those who use two fins (bi-fins). Different types of fins change how legs move in the water. This may affect the muscle structure and swimming performance. The researchers want to find out the differences between these two groups of swimmers.
During the study, the researchers will do the following:
Read more
Record the age, height, and weight of healthy swimmers who train regularly. Measure the stiffness and flexibility of the leg muscles using MyotonPro device.
Check how well the hips, knees, and ankles can move using digital goniometer.
The findings from this study will help create safer training programs for swimmers. Coaches will use the results to improve swimming performance and lower the risk of leg injuries.
- Being tested
- Measuring of the biomechanical properties of muscles with MyotonPro, Measurement of the length of the lower extremity with a tape measure., Measuring the range of motion of the lower extremity joints with a digital goniometer
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Measuring of the biomechanical properties of muscles with MyotonProDevice
MyotonPro is used to utilize the biomechanical properties of the muscle. During measurements, the patient will be seated in a chair with back support; the biomechanical properties of the rectus femoris, tibialis anterior, medial gastrocnemius, and hamstring muscles (F - Natural Oscillation Frequency [Hz], Tone or Tension ranges, S - Dynamic Stiffness [N/m], D - Logarithmic Decrease [relative unit], Elasticity increase, R - Mechanical Stress Relaxation Time [ms], C - Relaxation and Deformation Time Ratio [relaxation and deformation time ratio [N/m]) will be measured bilaterally using Myoton PRO. All measurements will be tracked according to the mileage.
Measurement of the length of the lower extremity with a tape measure.Device
Swimmers' right and left leg lengths (cm) will be measured. All measurements will be tracked in terms of kilometers covered. All measurements will be compared statistically according to pallet types.
Measuring the range of motion of the lower extremity joints with a digital goniometerDevice
Passive range of motion of the lower extremity shoulder joint (flexion, extension, adduction, abduction, external rotation, and internal rotation) will be measured using a digital goniometer. Results will be recorded in degrees (°). All measurements will be compared statistically according to pallet types.
| Study group | Role | What they receive |
|---|---|---|
| Monofin swimmers | Not described Receives: Device: Measuring of the biomechanical properties of muscles with MyotonPro; Device: Measurement of the length of the lower extremity with a tape measure.; Device: Measuring the range of motion of the lower extremity joints with a digital goniometer | |
| Bi-fin swimmers | Not described Receives: Device: Measuring of the biomechanical properties of muscles with MyotonPro; Device: Measurement of the length of the lower extremity with a tape measure.; Device: Measuring the range of motion of the lower extremity joints with a digital goniometer |
What is being measured
The primary outcome is the main question the study is designed to answer.
Measuring the biomechanical properties of muscles with MyotonPro
Bilaterally Biomechanical properties (F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension, S - Dynamic Stiffness [N/m], D - Logarithmic Decrement [relative unit], characterizing Elasticity, R - Mechanical Stress Relaxation Time [ms], C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep) of the rectus femoris, tibialis anterior, medial gastrocnemius and hamstring muscles were measured using Myoton PRO.
Because the MyotonPRO assessment yields a single-session composite outcome by presenting all relevant units concurrently on the screen, these variables were treated as a whole rather than being documented separately.
Measured: From enrollment to the end of treatment at 6 weeks
Secondary outcomes (2)
Measuring the length of lower extremity using a tape measure.
The measuring tape will be used to measure the swimmers' Right and left legs length (cm).
Measured: From enrollment to the end of measurements at 6 weeks.
Measuring the range of motion of the lower extremity using a digital goniometer
Passive range of motion of the lower extremity joints (flexion, extension, adduction, abduction, external rotation, and internal rotation) will be measured using a digital goniometer. Results will be recorded in degrees (°)
Measured: From enrollment to the end of 6 weeks.
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted2 Jun 2026
- Study start2 May 2026
- Primary completion15 Jun 2026 (estimated)
- Study completion30 Jun 2026 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in SwimmersStudies 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
- Observational
- Observational model
- Cohort
- Time perspective
- Prospective
- Enrolment
- 42 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Istanbul Gelisim University
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07621913
- Sponsor's protocol ID
- 27.04.2026-2026/04
- Status last verified
- May 2026
- First submitted
- 20 May 2026
- Last updated
- 2 Jun 2026
- Results posted
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 2 Jun 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Comparison of Lower Extremity Muscle Biomechanical Properties, Joint Range of Motion, and Performance Parameters in Monofin and Bi-fin Swimmers
- ClinicalTrials.gov ID
- NCT07621913
- Acronym / sponsor ID
- 27.04.2026-2026/04
- Study type
- Observational
- Recruitment status
- Active, not recruiting
- Enrolment
- 42 participants (estimated)
- Lead sponsor
- Istanbul Gelisim UniversityUniversity, hospital or other
- Study start
- 2 May 2026 (actual)
- Primary completion
- 15 Jun 2026 (estimated)
- Study completion
- 30 Jun 2026 (estimated)
- First posted
- 2 Jun 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 purpose of this study is to compare the leg muscle features and joint movements of swimmers who use a single large fin (monofin) versus those who use two fins (bi-fins). Different types of fins change how legs move in the water. This may affect the muscle structure and swimming performance. The researchers want to find out the differences between these two groups of swimmers.
During the study, the researchers will do the following:
Record the age, height, and weight of healthy swimmers who train regularly. Measure the stiffness and flexibility of the leg muscles using MyotonPro device.
Check how well the hips, knees, and ankles can move using digital goniometer.
The findings from this study will help create safer training programs for swimmers. Coaches will use the results to improve swimming performance and lower the risk of leg injuries.
Study design
- Observational model
- Cohort
- Time perspective
- Prospective
- Number of arms
- 2
| Arm | Type | Receives |
|---|---|---|
| Monofin swimmers | – | Device: Measuring of the biomechanical properties of muscles with MyotonPro, Device: Measurement of the length of the lower extremity with a tape measure., Device: Measuring the range of motion of the lower extremity joints with a digital goniometer |
| Bi-fin swimmers | – | Device: Measuring of the biomechanical properties of muscles with MyotonPro, Device: Measurement of the length of the lower extremity with a tape measure., Device: Measuring the range of motion of the lower extremity joints with a digital goniometer |
Who may qualify
- Ages
- 12 to 18 years
- Sex
- All
- Healthy volunteers
- Accepted
- Age groups
- Child, Adult
- Study population
- Young healthy swimmers
Key inclusion criteria (4 listed)
- Being between 12-18 years old
- Having been involved in at least one swimming style for at least 3 years
- Having participated in at least one competition
- Obtaining parental consent. Obtaining parental consent.
Key exclusion criteria (3 listed)
- - Having undergone any surgery on the shoulder girdle muscles.
- Having any orthopedic or physical disorder in the shoulder girdle muscles (e.g., frozen shoulder).
- Participating in another sport besides swimming.
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 |
|---|---|---|
| Measuring of the biomechanical properties of muscles with MyotonProMyotonPro is used to utilize the biomechanical properties of the muscle. During measurements, the patient will be seated in a chair with back support; the biomechanical properties of the rectus femoris, tibialis anterior, medial gastrocnemius, and hamstring muscles (F - Natural Oscillation Frequency [Hz], Tone or Tension ranges, S - Dynamic Stiffness [N/m], D - Logarithmic Decrease [relative unit], Elasticity increase, R - Mechanical Stress Relaxation Time [ms], C - Relaxation and Deformation Time Ratio [relaxation and deformation time ratio [N/m]) will be measured bilaterally using Myoton PRO. All measurements will be tracked according to the mileage. | Device | Bi-fin swimmers, Monofin swimmers |
| Measurement of the length of the lower extremity with a tape measure.Swimmers' right and left leg lengths (cm) will be measured. All measurements will be tracked in terms of kilometers covered. All measurements will be compared statistically according to pallet types. | Device | Bi-fin swimmers, Monofin swimmers |
| Measuring the range of motion of the lower extremity joints with a digital goniometerPassive range of motion of the lower extremity shoulder joint (flexion, extension, adduction, abduction, external rotation, and internal rotation) will be measured using a digital goniometer. Results will be recorded in degrees (°). All measurements will be compared statistically according to pallet types. | Device | Bi-fin swimmers, Monofin swimmers |
Primary outcome
Measuring the biomechanical properties of muscles with MyotonPro
Time frame: From enrollment to the end of treatment at 6 weeks
Bilaterally Biomechanical properties (F - Natural Oscillation Frequency [Hz], characterizing Tone or Tension, S - Dynamic Stiffness [N/m], D - Logarithmic Decrement [relative unit], characterizing Elasticity, R - Mechanical Stress Relaxation Time [ms], C - Ratio of Relaxation and Deformation time [relative unit], characterizing Creep) of the rectus femoris, tibialis anterior, medial gastrocnemius and hamstring muscles were measured using Myoton PRO. Because the MyotonPRO assessment yields a single-session composite outcome by presenting all relevant units concurrently on the screen, these variables were treated as a whole rather than being documented separately.
2 secondary outcomes
Measuring the length of lower extremity using a tape measure.
Time frame: From enrollment to the end of measurements at 6 weeks.
Measuring the range of motion of the lower extremity using a digital goniometer
Time frame: From enrollment to the end of 6 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 2 Jun 2026.
- Individual participant dataSharing planned: No
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 Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in Swimmers, run by Istanbul Gelisim 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 3 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: under way, not looking for participants, as of the sponsor's last update on 2 Jun 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?
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?
Measuring the biomechanical properties of muscles with MyotonPro (time frame: From enrollment to the end of treatment at 6 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 2 Jun 2026.