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Laser Therapy on Neuromuscular Performance

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ClinicalTrials.gov Identifier: NCT02813395
Recruitment Status : Completed
First Posted : June 27, 2016
Last Update Posted : June 27, 2016
Sponsor:
Information provided by (Responsible Party):
Jamilson Simões Brasileiro, Universidade Federal do Rio Grande do Norte

Brief Summary:
Objective: Investigating the immediate effects of Low Level Laser Therapy (LLLT) on neuromuscular performance in healthy subjects after an induced muscle fatigue protocol. Methods: Eighty volunteers of both genders aged between 18 and 28 years underwent a preliminary evaluation using surface electromyography and isokinetic dynamometer of the flexor muscles of the elbow. The subjects were randomly allocated into 4 groups: G1 was control group; G2 placebo; G3 laser applied before fatigue protocol; and G4 immediately after. Muscular fatigue protocol consisted of 30 maximal concentric isokinetic contractions at 120°/s of the elbow flexor muscles. An 808 nm equipment was used for applying laser therapy, with a power of 100 mW and total energy of 20 J. Volunteers were reassessed after interventions.

Condition or disease Intervention/treatment Phase
Fatigue Device: Low Level Laser Therapy Device: Placebo Laser Not Applicable

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Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 80 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Triple (Participant, Investigator, Outcomes Assessor)
Official Title: Immediate Effects of Low-level Laser Therapy (808nm) on Neuromuscular Performance After Muscle Fatigue: Randomized-blinded Clinical Trial
Study Start Date : April 2014
Actual Primary Completion Date : March 2015
Actual Study Completion Date : August 2015

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Fatigue

Arm Intervention/treatment
No Intervention: Control group
Volunteers remained at rest before and after the fatigue protocol.
Placebo Comparator: Placebo group
Volunteers were subjected to laser application simulation for approximately four minutes with a second pen of the laser device, which was disconnected and did not effectively irradiate energy.
Device: Placebo Laser
Laser application simulation with a second pen of the laser device, which was disconnected and did not effectively irradiate energy.

Experimental: Laser before
Volunteers received effective application of laser before fatigue protocol.
Device: Low Level Laser Therapy

Low Level Laser Therapy was applied at four points to the dominant upper limb of the volunteers on the muscle belly of the biceps. Delineation was done using a measuring tape from the elbow joint line to the acromion marked at points corresponding to 20%, 30%, 40% and 50% of this distance, focusing the application on the muscle belly region, thereby excluding the tendinous region.

An 808 nm equipment was used for applying laser therapy, with a power of 100 mW and total energy of 20 J.


Experimental: Laser after
Volunteers received effective application of laser after fatigue protocol.
Device: Low Level Laser Therapy

Low Level Laser Therapy was applied at four points to the dominant upper limb of the volunteers on the muscle belly of the biceps. Delineation was done using a measuring tape from the elbow joint line to the acromion marked at points corresponding to 20%, 30%, 40% and 50% of this distance, focusing the application on the muscle belly region, thereby excluding the tendinous region.

An 808 nm equipment was used for applying laser therapy, with a power of 100 mW and total energy of 20 J.





Primary Outcome Measures :
  1. Peak torque normalized by body weight [ Time Frame: Change from baseline to one hour. ]


Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 28 Years   (Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   Yes
Criteria

Inclusion Criteria:

  • Being between 18-28 years of age, having no pain in the shoulder area, elbow or hand, and not having suffered any to injury to the assessed upper limb in the last six months.

Exclusion Criteria:

  • Presenting pain that prevented the completion of the evaluation, subjects whose data were improperly recorded or if the volunteer withdrew from the study.

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT02813395


Locations
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Brazil
Federal University of Rio Grande do Norte
Natal, RN, Brazil, 59140-840
Sponsors and Collaborators
Universidade Federal do Rio Grande do Norte
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Responsible Party: Jamilson Simões Brasileiro, PhD, Universidade Federal do Rio Grande do Norte
ClinicalTrials.gov Identifier: NCT02813395    
Other Study ID Numbers: RMV2016
First Posted: June 27, 2016    Key Record Dates
Last Update Posted: June 27, 2016
Last Verified: June 2016
Additional relevant MeSH terms:
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Fatigue