Laser Therapy on Neuromuscular Performance

NCT02813395 | Completed

• 1 other identifier: RMV2016
• Study Type: interventional
• Target: 80
• Locations: 1 country
• Sites: 1

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.

Conditions

Fatigue

Outcome Measures

Primary Outcomes (1)

• Peak torque normalized by body weight

  Change from baseline to one hour.

Study Arms (4)

Control group

NO INTERVENTION

Volunteers remained at rest before and after the fatigue protocol.

Placebo group

PLACEBO COMPARATOR

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 before

EXPERIMENTAL

Volunteers received effective application of laser before fatigue protocol.

Device: Low Level Laser Therapy

Laser after

EXPERIMENTAL

Volunteers received effective application of laser after fatigue protocol.

Device: Low Level Laser Therapy

Interventions

Low Level Laser Therapy DEVICE

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.

Laser after; Laser before

Placebo Laser DEVICE

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

Placebo group

Eligibility Criteria

• Age: 18 Years - 28 Years
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64)

You may qualify if:

• 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.

You may not qualify if:

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

Sponsors & Collaborators

• Universidade Federal do Rio Grande do Norte: lead

Study Sites (1)

Federal University of Rio Grande do Norte

Natal, Rio Grande do Norte, 59140-840, Brazil

Location

MeSH Terms

Conditions

Fatigue

Interventions

Low-Level Light Therapy

Condition Hierarchy (Ancestors)

Signs and Symptoms; Pathological Conditions, Signs and Symptoms

Intervention Hierarchy (Ancestors)

Laser Therapy; Therapeutics; Phototherapy

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: TRIPLE
• Who Masked: PARTICIPANT, INVESTIGATOR, OUTCOMES ASSESSOR
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: PhD

Study Record Dates

• First Submitted: June 21, 2016
• First Posted: June 27, 2016
• Study Start: April 1, 2014
• Primary Completion: March 1, 2015
• Study Completion: August 1, 2015
• Last Updated: June 27, 2016

Record last verified: 2016-06

Locations

BR (1)