Laser Therapy on Hamstring Muscle Among Young Adults

Overview

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.

Full Title of Study: “High-intensity Laser Therapy on Hamstring Muscle Length Among Young Adults”

Study Type

  • Study Type: Interventional
  • Study Design
    • Allocation: Randomized
    • Intervention Model: Parallel Assignment
    • Primary Purpose: Treatment
    • Masking: Single (Participant)
  • Study Primary Completion Date: August 19, 2023

Interventions

  • Device: Active High-intensity laser therapy
    • 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
  • Device: Sham High-intensity laser therapy
    • Sham High-intensity laser therapy will be used in the contact method, without the laser beam irradiation over the hamstring muscle.

Arms, Groups and Cohorts

  • Experimental: High-intensity laser therapy
    • 77 participants will receive active high-intensity laser therapy interventions on hamstring muscle to improve the flexibility of muscle
  • Sham Comparator: Sham High-intensity laser therapy
    • 77 participants will receive sham high-intensity laser therapy on hamstring muscle

Clinical Trial Outcome Measures

Primary Measures

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

Participating in This Clinical Trial

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

Gender Eligibility: All

Minimum Age: 18 Years

Maximum Age: 30 Years

Are Healthy Volunteers Accepted: Accepts Healthy Volunteers

Investigator Details

  • Lead Sponsor
    • Maharishi Markendeswar University (Deemed to be University)
  • Provider of Information About this Clinical Study
    • Principal Investigator: Asir John Samuel, Associate Professor – Maharishi Markendeswar University (Deemed to be University)
  • Overall Official(s)
    • Adarsh K Srivastav, PhD Scholar, Principal Investigator, MMIPR, MM(DU)
    • Asir J Samuel, PhD, Study Director, MMIPR, MM(DU)

References

Cejudo A, Centenera-Centenera JM, Santonja-Medina F. The Potential Role of Hamstring Extensibility on Sagittal Pelvic Tilt, Sagittal Spinal Curves and Recurrent Low Back Pain in Team Sports Players: A Gender Perspective Analysis. Int J Environ Res Public Health. 2021 Aug 16;18(16):8654. doi: 10.3390/ijerph18168654.

Jozwiak M, Pietrzak S, Tobjasz F. The epidemiology and clinical manifestations of hamstring muscle and plantar foot flexor shortening. Dev Med Child Neurol. 1997 Jul;39(7):481-3. doi: 10.1111/j.1469-8749.1997.tb07468.x.

Medeiros DM, Aimi M, Vaz MA, Baroni BM. Effects of low-level laser therapy on hamstring strain injury rehabilitation: A randomized controlled trial. Phys Ther Sport. 2020 Mar;42:124-130. doi: 10.1016/j.ptsp.2020.01.006. Epub 2020 Jan 10.

Dornelles MP, Fritsch CG, Sonda FC, Johnson DS, Leal-Junior ECP, Vaz MA, Baroni BM. Photobiomodulation therapy as a tool to prevent hamstring strain injuries by reducing soccer-induced fatigue on hamstring muscles. Lasers Med Sci. 2019 Aug;34(6):1177-1184. doi: 10.1007/s10103-018-02709-w. Epub 2019 Jan 3.

Hughes T, Callaghan M. BET 2: LASER THERAPY IN THE TREATMENT OF ACUTE HAMSTRING MUSCLE INJURIES. Emerg Med J. 2017 Apr;34(4):266. doi: 10.1136/emermed-2017-206665.2.

Ramos GA, Arliani GG, Astur DC, Pochini AC, Ejnisman B, Cohen M. Rehabilitation of hamstring muscle injuries: a literature review. Rev Bras Ortop. 2016 Dec 15;52(1):11-16. doi: 10.1016/j.rboe.2016.12.002. eCollection 2017 Jan-Feb.

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