Photobiomodulation Therapy Combined With Static Magnetic Field on the Subsequent Performance

Not Applicable

Completed

• Conditions: Skeletal Muscle Performance
• Interventions: Device: Active PBMT-sMF; Device: Placebo PBMT-sMF

• Registration Number: NCT04934709
• Lead Sponsor: University of Nove de Julho

Brief Summary

There is evidence about the effects of photobiomodulation therapy (PBMT) alone and combined with static magnetic field (PBMT-sMF) on skeletal muscle fatigue, physical performance and post-exercise recovery in different types of exercise protocols and sports activity. However, it is unknown the effects of PBMT-sMF to improve the subsequent performance after a first set of exercise. Therefore, the aim of this study was to investigate the effects of PBMT-sMF, applied between two sets of exercises, on the subsequent physical performance.

Detailed Description

A randomized, crossover, triple-blinded (assessors, therapist and volunteers), placebo-controlled trial was carried out. Healthy non-athletes' male volunteers were randomized and treated with a single application of PBMT-sMF and placebo between two sets of an exercise protocol performed on isokinetic dynamometer.

The order of interventions was randomized.

The primary outcome was fatigue index, measured by isokinetic dynamometer during the exercise protocol. The secondary outcomes were total work and peak torque measured by isokinetic dynamometer during the exercise protocol; and blood lactate, measured by blood samples collected before, 3 minutes after the first set of the exercise protocol, 3 minutes after the application of the intervention and 3 minutes after the second set of the exercise protocol.

Statistical analysis:

The findings were tested for normality using the Kolmogorov-Smirnov test and were determined to have a normal distribution. Data were expressed as the mean and standard deviation, and a two-way repeated measures ANOVA was performed to test between-group differences at each timepoint (treatment effects), mean difference (MD) and 95% confidence intervals (CI), followed by the Bonferroni post hoc test. The significance level was set at p \< 0.05.

Study Timeline

• Study Start: 2015-05
• Primary Completion: 2015-09
• Study Completion: 2015-09
• Status Verified: 2021-06
• Study First Submitted: 2021-06-10
• Study First Submitted QC: 2021-06-18
• Last Update Submitted: 2021-06-18
• Study First Posted: 2021-06-22
• Last Update Posted: 2021-06-22

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 12

Inclusion Criteria

Not provided

Exclusion Criteria

Not provided

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: CROSSOVER

Arm && Interventions

Group	Intervention	Description
PBMT-sMF	Active PBMT-sMF	Volunteers underwent intervention (active PBMT-sMF) in the non-dominant lower limb. A single application was performed at each phase of the trial, between the first and second set of the exercise protocol.
Placebo	Placebo PBMT-sMF	Volunteers underwent intervention (placebo PBMT-sMF) in the non-dominant lower limb. A single application was performed at each phase of the trial, between the first and second set of the exercise protocol.

Primary Outcome Measures

Name	Time	Method
Fatigue index	1 minute after the end of exercise protocol.	Variable provided directly by the isokinetic dynamometer during the exercise protocol.

Secondary Outcome Measures

Name	Time	Method
Total work	1 minute after the end of exercise protocol.	Variable provided directly by the isokinetic dynamometer during the exercise protocol.
Peak torque	1 minute after the end of exercise protocol.	Variable provided directly by the isokinetic dynamometer during the exercise protocol.
Blood lactate	3 minutes after the first set of the exercise protocol, 3 minutes after the application of the intervention and 3 minutes after the second set of the exercise protocol.	Measured by blood samples.

Trial Locations

Locations (1)

Laboratory of Phototherapy and Innovative Technologies in Health; 🇧🇷 São Paulo, Brazil