NCT02813395

Laser Therapy on Neuromuscular Performance

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

• Status: Completed
• Phase: N/A
• Study type: Interventional
• Enrollment: 80 (actual)
• Sponsor: Universidade Federal do Rio Grande do Norte · Academic / Other
• Sex: All
• Age: 18 Years – 28 Years
• Healthy volunteers: Accepted

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.

Conditions

• Fatigue

Interventions

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

Timeline

• Start date: 2014-04-01
• Primary completion: 2015-03-01
• Completion: 2015-08-01
• First posted: 2016-06-27
• Last updated: 2016-06-27

Locations

1 site across 1 country: Brazil