Optimal Duration of Stretching of the Hamstring Muscle Group in Elderly: A Randomized Controlled Trial

Study Overview
=================
Brief Summary
-----------------
identification of optimal duration for hamstring muscle stretch by using 3 different time of stretch 15,30,60 seconds .100 subjects will be participated in this study divided into 4 group one control and 3 experimental groups according to stretch time.

Detailed Description
-----------------
Abstract: OBJECTIVE: To explore the effect of variable stretching intervals on neural function and ROM. DESIGN: Randomized controlled trial Participants: In this trial, 100 participants will participate in the study diagnosed with tight hamstring muscles (defined as the inability to extend the knee to less than 20° of knee flexion) were randomly assigned to the control group or one of the 3 intervention groups Interventions: The three experimental groups will stretched 5 times per week for 4 weeks for 15, 30, and 60 seconds, respectively the control group did not stretch Main Outcome Measures: The neurophysiological outcome measures included peak to peak somatosensory evoked potential for dermatomes L3,L4,L5, and S1. Secondary outcome measures included knee ROM. All outcome measures will be assessed immediately after the treatment session and 24 hours after the treatment session.

Official Title
-----------------
Optimal Time of Hamstring Stretch in Elderly

Conditions
-----------------
Stretch

Intervention / Treatment
-----------------
* Procedure: stretch hamstring


Participation Criteria
=================
Eligibility Criteria
-----------------
Inclusion Criteria: Subjects had to demonstrate tight hamstring muscles, defined as inability to extend the knee to less than 20 degrees of knee flexion with the femur held at 90 degrees of hip flexion while the person was positioned supine. Subjects were also screened to rule out knee joint flexion contractures by checking knee extension ROM, while they were lying in a prone position Exclusion Criteria: Using of medical aids, and suffering from any neurological or cognitive impairment, limiting cardio-respiratory conditions, or had undergone recent surgery (within the past 12 months). Having any hip or knee replacements or any history of pathology in the low back, hips, or knees for the 3 months prior to the study

Ages Eligible for Study
-----------------
Minimum Age: 55 Years
Maximum Age: 65 Years

Sexes Eligible for Study
-----------------
All

Accepts Healthy Volunteers
-----------------
Accepts Healthy Volunteers

Study Plan
=================
How is the study designed?
-----------------

Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Interventional Model Description: randomized controlled trial study 100 participants will be recruited to participate in the study after assigning a conset form, participants will be divided into 4 group ,one control which will not receive stretch of hamstring and 3 experimental groups will recive different duration for hamstring stretch 15,30,60 and DSSEP will be measured as the primary outcome and knee ROM will be measured as a secondary outcomes in order to identify the optimal duration of hamstring stretch
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: 15 second stretch<br>Stretching of the hamstring muscles was performed by the primary researcher for 15 seconds. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible | Procedure: stretch hamstring<br>* Stretching of the hamstring muscles was performed by the primary researcher. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible<br>|
| Experimental: 30 second stretch<br>Stretching of the hamstring muscles was performed by the primary researcher for 30 seconds. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible | Procedure: stretch hamstring<br>* Stretching of the hamstring muscles was performed by the primary researcher. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible<br>|
| Experimental: 60 second stretch<br>Stretching of the hamstring muscles was performed by the primary researcher for 60 seconds. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible | Procedure: stretch hamstring<br>* Stretching of the hamstring muscles was performed by the primary researcher. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible<br>|
| Sham Comparator: control<br>The control group followed the same procedures except that no stretching force was applied at the end | Procedure: stretch hamstring<br>* Stretching of the hamstring muscles was performed by the primary researcher. A straight-leg-raising technique was used for this stretch because we believe that it is commonly used in the clinical setting for elderly people. All subjects were supine lying as flat as possible<br>|

What is the study measuring?
-----------------
Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Neurophysiological findings. | Neurophysiological findings included peak to peak somatosensory evoked potentials (DSSEPs) for L3,L4,L5,S1 dermatomes. | Assessments of the change of DSSEPs from baseline to immediatly after session and at 24 hour after session | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| ROM | Each subject was then measured for knee extension ROM on both lower extremities | Assessments of the change of Knee ROM from baseline to immediatly after session and at 24 hour after session | 

 Terms related to the study
=================
Keywords Provided by Centre Hospitalier Valida
-----------------
Stretching, Randomized controlled trial, Hamstring