An interventional study of Thoracolumbar fascia inhibition and Suboccipital inhibition group in Healthy Individuals With Hamstring Tightness, sponsored by Bulent Ecevit University. Completed at 1 site in Turkey (Türkiye). Open to participants aged 18 Years to 25 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-08-05.
Sponsored by Bulent Ecevit University · Not applicable, Interventional, and Treatment
This randomized controlled trial aimed to compare the immediate effects of two self-myofascial release techniques-suboccipital muscle inhibition and thoracolumbal fascia inhibition-on hamstring flexibility, spinal range of motion, and balance in healthy adults. A total of 75 participants with hamstring tightness were randomly assigned to one of three groups: suboccipital inhibition, thoracolumbal inhibition, or control. All participants performed hamstring stretching, and the intervention groups received one of the inhibition techniques immediately after. Outcomes were measured at baseline and within 30 minutes post-intervention. The study found that both techniques led to significant improvements in hamstring flexibility and spinal mobility, with region-specific benefits. The thoracolumbal technique was more effective for trunk and hamstring flexibility, while the suboccipital technique provided greater cervical mobility gains. Balance improvements were limited. These findings support the use of targeted myofascial interventions in clinical practice.
Bulent Ecevit University is the lead sponsor of 47 studies on the registry; 2 are open to participants now.
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Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
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Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Other: hamstring stretching
Other: Thoracolumbar fascia inhibition · Other: hamstring stretching
Other: Suboccipital inhibition group · Other: hamstring stretching
Soft tissue mobilization: Participants will be asked to lie on their backs without a pillow in a hook-lying position, placing a foam roller under the inferior part of the scapula and clasping their hands behind the cervical region. Then, they will be instructed to lift their hips off the ground and roll the foam roller in a cranial and caudal direction from the inferior scapular region to the sacral area for 30 seconds, performing flexion and extension movements with their knees. This application will be performed in a total of 4 sets.
Soft tissue mobilization: Participants will be asked to lie in a supine position on an appropriate surface and keep their knees in extension. Then, they will be instructed to hold both ends of a sheet and place the middle part of the sheet on the plantar surface of one foot. Using the sheet and by dorsiflexing the ankle, they will pull the extended leg toward themselves. This position should be maintained for 30 seconds (8). It is important that the opposite knee does not flex during the exercise. The application will be performed bilaterally.
Participants performed passive hamstring stretching using a sheet for self-assistance. Participants will be asked to lie supine on an appropriate surface and keep their knees in extension. Then, they will be instructed to hold both ends of a sheet and place the middle part of the sheet on the plantar surface of one foot. Using the sheet and performing ankle dorsiflexion, they will pull the leg-kept in knee extension-toward themselves. This position should be held for 30 seconds (8). It is important that the opposite knee does not move into flexion during the exercise. The application will be performed bilaterally.
Change in Cervical Range of Motion (degrees) from Baseline to Post-Intervention
Cervical range of motion (flexion, extension, lateral flexion, rotation) in healthy individuals with hamstring tightness.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Change in Finger-to-Floor Distance from Baseline to Post-Intervention
Finger-to-Floor Distance was used to assess hamstring flexibility. Measurements were taken pre-intervention and within 30 minutes following the intervention.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Change in Y Balance Test from Baseline to Post-Intervention
The Y Balance Test was used to assess dynamic balance, with participants reaching in the anterior, posteromedial, and posterolateral directions while standing on one leg. The average reach distance in centimeters (cm) was recorded for each direction. The test was administered at baseline and within 30 minutes post-intervention to assess immediate changes in balance performance.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Change in Active Knee Extension Angle (degrees) from Baseline to Post-Intervention
Active Knee Extension Test (AKET): Degree of knee extension measured using a goniometer. Higher values indicate greater flexibility.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Change in The Stork Balance Test from Baseline to Post-Intervention
The Stork Balance Test was used to evaluate static balance by measuring how long (in seconds) a participant could maintain a balanced stance on one leg.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Change in Lumbal Range of Motion (degrees) from Baseline to Post-Intervention
Lumbal range of motion (flexion, extension) in healthy individuals with hamstring tightness.
Time frame: Baseline and immediately (within 30 minutes) post-intervention
Plan to share: Yes — All procedures involving human participants were conducted in accordance with ethical standards. Written informed consent was obtained from all participants prior to the study. Data other than the participants' personal information (e.g., pre- and post-intervention muscle flexibility measurements) were used solely for research purposes. Participant privacy and confidentiality were strictly protected throughout the study.
Supporting information: Study protocol, Statistical analysis plan
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Ran from Mar 2025 to primary completion in Jun 2025, 2 months.
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Bulent Ecevit University