Laser Therapy on Neuromuscular Performance

Fatigue Clinical Trial

Official title:

Immediate Effects of Low-level Laser Therapy (808nm) on Neuromuscular Performance After Muscle Fatigue: Randomized-blinded Clinical Trial

Clinical Trial Details — Status: Completed

Administrative data

• NCT number: NCT02813395
• Other study ID #: RMV2016
• Status: Completed
• Phase: N/A
• First received: June 21, 2016
• Last updated: June 24, 2016
• Start date: April 2014
• Est. completion date: August 2015

Study information

• Verified date: June 2016
• Source: Universidade Federal do Rio Grande do Norte
• Contact: n/a
• Is FDA regulated: No
• Health authority: Brazil: Ethics Committee
• Study type: Interventional

Clinical Trial 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.

Recruitment information / eligibility

• Status: Completed
• Enrollment: 80
• Est. completion date: August 2015
• Est. primary completion date: March 2015
• Accepts healthy volunteers: Accepts Healthy Volunteers
• Gender: Both
• Age group: 18 Years to 28 Years

Eligibility

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.

Study Design

Allocation: Randomized, Intervention Model: Parallel Assignment, Masking: Double Blind (Subject, Investigator, Outcomes Assessor)

Related Conditions & MeSH terms

• Fatigue

Intervention

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.
• Placebo Laser
Laser application simulation with a second pen of the laser device, which was disconnected and did not effectively irradiate energy.

Locations

Country	Name	City	State
Brazil	Federal University of Rio Grande do Norte	Natal	RN

Sponsors (1)

Lead Sponsor	Collaborator
Universidade Federal do Rio Grande do Norte

Country where clinical trial is conducted

Brazil, 

Outcome

Type	Measure	Description	Time frame	Safety issue
Primary	Peak torque normalized by body weight		Change from baseline to one hour.	Yes