Immediate Effects of Hamstring Stretching Alone or Combined With Myofascial Release

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 30 years
• All sexes
• Healthy volunteers accepted
• Adult

Trial locations and contacts

1 site in 1 country.

About this study

Official title: The Immediate Effects of Hamstring Stretching Alone or Combined With Myofascial Release of the Hamstring Muscle on Masseter Muscle Activity, Pressure Pain Threshold, Active Mouth Opening, Hamstring Flexibility, and Forward Head Flexed Posture in Recreationally Active Participants: A Randomized, Double-Blind, Controlled Trial Study

Conditions

Hamstring Injury, Masseter, Myofascial Release, Stretching, Surface EMG, Temporomandibular Joint Disorders

Being tested

Static stretching, Myofascial Release

Medical subject headings

Temporomandibular Joint Disorders

What participants receive

What participants receive. In a randomised study each person is assigned to one group by chance.

• Static stretchingProcedure or surgery

  The participant was positioned supine for static stretching to be applied to the hamstring muscles. The physiotherapist flexed the participant's hip to the point where resistance to the movement was first observed, with the knee extended.At this point, after waiting for 40 seconds, it was returned to the previous position. This application was made on both sides [Bretischwerdt]. The technique was repeated three times, with a 15-second rest interval between each repetition.

• Myofascial ReleaseProcedure or surgery

  For hamstring muscles, the participants were asked to assume a long sitting position on a firm, flat surface with their arms behind their backs and their body weight on their palms. A foam roller was placed under the hamstring muscles and slowly moved the tuberositas ischii popliteus back and forth with pressure for 4 minutes.

What is being measured

The primary outcome is the main question the study is designed to answer.

1. superficial masseter muscles EMG activity

   For each subject, EMG activity was recorded from the left and right superficial masseter muscles using a multichannel EMG device.

   Measured: 4 weeks

2. Pressure pain threshold

   The pressure pain threshold was measured using a mechanical pressure algometer (model Baseline® Dolorimeters - Fabrication Enterprises Inc) with a contact head of 1 cm2 area.The participant was positioned lying supine while the pressure pain threshold of the masseter muscle's central trigger point was assessed on both sides. Pressure was applied perpendicular to the masseter, gradually and continuously at a rate of about 1 kg/cm/s. The participants were requested to let the examiner know as soon as pain started to be felt. With a 2-min rest period between each experiment, three pressure pain threshold measures were taken. The average value of the three trials was calculated and used in the analysis.

   Measured: 4 weeks

3. Maximum Active Mouth Opening

   A tape measure was used to determine the maximum active mouth opening (MMO). The participants were measured while laying flat on their back with the head resting on a table, the cervical spine in a neutral position, the knees slightly bent, and the upper limbs lying parallel to the torso. The subjects were instructed to open the mouth as wide as possible without inflicting discomfort. The distance between the upper and lower central incisors was measured and recorded in millimetres. For the primary analysis, the mean value of three trials was calculated.

   Measured: 4 weeks

4. Hamstring Flexibility

   The Maximal Hip Flexion Active Knee Extension (MHFAKE) Test, which is an adapted active knee extension test, was performed to evaluate the hamstring flexibility of the participant. The subject was instructed to keep the hip in maximal flexion by clutching the thigh to the chest, with the hands holding the opposite elbows, and then to actively extend the knee until reaching the point of maximal tolerable stretch of the hamstring muscle or the point where pain was reported. The contralateral leg was fixed by the clinician. The angle of inclination of the mid-shin was measured at the endpoint of maximal stretch with the handheld inclinometer.

   Measured: 4 weeks

5. Tragus Wall Distance

   Tragus wall distance measurement was used to evaluate spinal mobility. The participants were instructed to stand with their feet shoulder-width apart, and heels, hips, and shoulders against the wall. Then, before each measurement, the participants were asked to "stand with good posture, look straight ahead, and hold this position until the measurement is taken". The participants were then told to take a self-selected position for the head and neck that reflected their perception of "good posture". The distance between the tragus and the wall was measured and the participant was repositioned away from the wall before each measurement

   Measured: 4 weeks

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

1. First posted27 Jan 2023
2. Study start22 Jul 2022
3. Primary completion22 Jan 2023
4. Study completion20 Feb 2023 (estimated)

Resources

• Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
• Other trials for Hamstring InjuryStudies of the same condition, open and under way.
• More trials run by Ankara Yildirim Beyazıt UniversityThe sponsor's other registered studies.
• 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.