Laser Therapy on Neuromuscular Performance

Not Applicable

Completed

• Conditions: Fatigue
• Interventions: Device: Placebo Laser; Device: Low Level Laser Therapy

• Registration Number: NCT02813395
• Lead Sponsor: 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.

Detailed Description

Not available

Study Timeline

• Study Start: 2014-04
• Primary Completion: 2015-03
• Study Completion: 2015-08
• Status Verified: 2016-06
• Study First Submitted: 2016-06-21
• Study First Submitted QC: 2016-06-24
• Last Update Submitted: 2016-06-24
• Study First Posted: 2016-06-27
• Last Update Posted: 2016-06-27

Recruitment & Eligibility

• Status: COMPLETED
• Sex: All
• Target Recruitment: 80

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

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo group	Placebo Laser	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.
Laser before	Low Level Laser Therapy	Volunteers received effective application of laser before fatigue protocol.
Laser after	Low Level Laser Therapy	Volunteers received effective application of laser after fatigue protocol.

Primary Outcome Measures

Name	Time	Method
Peak torque normalized by body weight	Change from baseline to one hour.

Trial Locations

Locations (1)

Federal University of Rio Grande do Norte; 🇧🇷 Natal, RN, Brazil