Laser Therapy on Hamstring Muscle Among Young Adults

Study Overview
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Brief Summary
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A total of 154 healthy young individuals will be recruited by purposive sampling method to participate in a randomized, single-blinded, sham-controlled study. Recruited participants will be randomly dividing into two groups, the Active high-intensity laser therapy (a-HILT) group, and the Sham high-intensity laser therapy (s-HILT) group. The treatment duration will be 10 minutes per session on both lower limbs for each day for 3 days/week for 2 weeks. Hamstring muscle length will be assessed at baseline, end of the 2-week post-intervention period.

Official Title
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High-intensity Laser Therapy on Hamstring Muscle Length Among Young Adults

Conditions
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Muscle Tightness

Intervention / Treatment
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* Device: Active High-intensity laser therapy
* Device: Sham High-intensity laser therapy


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Asymptomatic young adults Both gender Tightness of hamstring muscles Exclusion Criteria: Any other musculoskeletal disorder Any disc pathology Any nerve root irritation Any surgical history or trauma Malignancy Pregnancy Sensory dysfunctions Cardiac pacemaker

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 30 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Treatment
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Single


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: High-intensity laser therapy<br>77 participants will receive active high-intensity laser therapy interventions on hamstring muscle to improve the flexibility of muscle | Device: Active High-intensity laser therapy<br>* High-intensity laser therapy will be used in the contact method, with the laser beam irradiated over the hamstring muscle. Dosage and parameters for the laser will be calculated. Parameters- Wavelength- 980 nm Intensity/Power density- 3W/cm2 Emission mode- Continuous Emission Energy (Joules)- 490 J Irradiation time- 70 Sec on each point Peak power- 15 Watt Irradiation points- 09<br>|
| Sham Comparator: Sham High-intensity laser therapy<br>77 participants will receive sham high-intensity laser therapy on hamstring muscle | Device: Sham High-intensity laser therapy<br>* Sham High-intensity laser therapy will be used in the contact method, without the laser beam irradiation over the hamstring muscle.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Active Knee Extension Test | Active knee extension test (AKET) is most reliable method to assess the hamstring tightness. | Changes will be measured at baseline, end of two week post intervention | 
| Sit and toe touch test | Sit and toe touch test is used to assess the hamstring flexibility | Changes will be measured at baseline, end of two week post intervention | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Hamstring, Flexibility, Laser therapy, Young adults