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Comparison of Lower Extremity Parameters in Monofin and Bi-fin Swimmers.

Comparison of Lower Extremity Muscle Biomechanical Properties, Joint Range of Motion, and Performance Parameters in Monofin and Bi-fin Swimmers

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07621913
Enrollment
42
Registered
2026-06-02
Start date
2026-05-02
Completion date
2026-06-30
Last updated
2026-06-02

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

Conditions

Lower Extremity Muscles Biomechanical Properties and Joint Range of Motion in Swimmers

Brief 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. 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.

Interventions

DEVICEMeasuring of the biomechanical properties of muscles with MyotonPro

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.

DEVICEMeasurement 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.

DEVICEMeasuring the range of motion of the lower extremity joints with a digital goniometer

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.

Sponsors

Istanbul Gelisim University
Lead SponsorOTHER

Study design

Observational model
COHORT
Time perspective
PROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
12 Years to 18 Years
Healthy volunteers
Yes

Inclusion criteria

* Inclusion Criteria: * 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.

Exclusion criteria

* \- 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.

Design outcomes

Primary

MeasureTime frameDescription
Measuring the biomechanical properties of muscles with MyotonProFrom enrollment to the end of treatment at 6 weeksBilaterally 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.

Secondary

MeasureTime frameDescription
Measuring the length of lower extremity using a tape measure.From enrollment to the end of measurements at 6 weeks.The measuring tape will be used to measure the swimmers' Right and left legs length (cm).
Measuring the range of motion of the lower extremity using a digital goniometerFrom enrollment to the end of 6 weeks.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 (°)

Countries

Turkey (Türkiye)

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Jun 3, 2026