Laser Therapy on Neuromuscular Performance

NCT ID: NCT02813395

Last Updated: 2016-06-27

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 80 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2014-04-30
• Study Completion Date: 2015-08-31

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

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Blinding Strategy: TRIPLE

Study Groups

Control group

Volunteers remained at rest before and after the fatigue protocol.

Group Type: NO_INTERVENTION

No interventions assigned to this group

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.

Group Type: PLACEBO_COMPARATOR

Placebo Laser

Intervention Type: DEVICE

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

Laser before

Volunteers received effective application of laser before fatigue protocol.

Group Type: EXPERIMENTAL

Low Level Laser Therapy

Intervention Type: 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

Volunteers received effective application of laser after fatigue protocol.

Group Type: EXPERIMENTAL

Low Level Laser Therapy

Intervention Type: 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.

Interventions

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.

Intervention Type: DEVICE

Placebo Laser

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

Intervention Type: DEVICE

Eligibility 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.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 28 Years
• Eligible Sex: ALL
• Accepts Healthy Volunteers: Yes

Sponsors

Universidade Federal do Rio Grande do Norte

OTHER

Sponsor Role: lead

Responsible Party

Jamilson Simões Brasileiro

PhD

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Federal University of Rio Grande do Norte

Natal, Rio Grande do Norte, Brazil

Countries

Brazil

Other Identifiers

RMV2016

Identifier Type: -

Identifier Source: org_study_id