Effects of Phototherapy Associated With Sprint and Squat Training on Cardiac Autonomic Modulation

NCT ID: NCT03566186

Last Updated: 2018-06-25

Basic Information

• Recruitment Status: COMPLETED
• Clinical Phase: NA
• Total Enrollment: 39 participants
• Study Classification: INTERVENTIONAL
• Study Start Date: 2017-09-03
• Study Completion Date: 2017-12-19

Brief Summary

Recent studies have shown positive results in the application of phototherapy for the improvement of performance and acceleration of the healing process of the body homeostasis. Among the methods used to assess the recovery post-exercise has cardiac autonomic modulation assessed by heart rate variability (HRV), a tool widely used in sports to evaluate medium global behavior of the autonomic nervous system. Objective: analyze and compare the effect of a special protocol of phototherapy using different light sources interacting with a combined training with an autonomic modulation of heart rate in different moments (baseline; tracking daily; recovery post-exercise and after training). Method: 45 male participants will be allocated from a stratified randomization into three groups: control (n=15), placebo (n=15) and group special protocol of phototherapy (n=15). Participants will perform a combined training of sprints and squats twice a week for twelve weeks divided into two phases. The application of phototherapy and placebo was administered in phase 2, after sprints and just before the squat. The phototherapy was used combine different light sources and wavelength (red and infrared). Was analyze HRV in five moments: baseline; traking daily; week target of phase I and II; after training. The weeks target consist of training sessions with greater energy expenditure (largest intensity). The sphericity of the data was tested by Mauchly test. In case of violation of the sphericity assumption, the correction of Greenhouse-Geisser was performed. The data was analyzed using analysis of variance for repeated measures (Bonferroni post-test), which provide information on the effects of time, group and interaction. All statistical analyzes assume the significance level of 5%.

Conditions

Phototherapy; Autonomic Nervous System; Training

Study Design

• Allocation Method: RANDOMIZED
• Intervention Model: PARALLEL
• Primary Study Purpose: OTHER
• Blinding Strategy: TRIPLE

Study Groups

Active phototherapy group

(n=12) Phase 2 training + active phototherapy Dosage applied was 30J per site (180J per muscle) to six sites on the quadriceps The MR4 LaserShower 50 4D emitter (MultiRadiance Medical, USA). The optical power was calibrated before irradiationin each participant using a Thorlabs thermal power meter(Model S322C, Thorlabs, Newton, NJ, USA).

Group Type: EXPERIMENTAL

Phototherapy

Intervention Type: OTHER

Photobiomodulation or photobiostimulation, this technique is the application of monochromatic light that can influence cellular activity through inhibition or stimulation of chemical and biological functions.

Placebo group

(n=14) Phase 2 training + placebo phototherapy group

Group Type: PLACEBO_COMPARATOR

Placebo

Intervention Type: OTHER

The same procedures as in the active phototherapy group was applied to the placebo group; however, the emitter was disabled. The device was emit the same sounds regardless of the programmed mode (active phototherapy).

non-treatment control group

(n=13) Phase 2 training + control group

Group Type: OTHER

Passive recovery

Intervention Type: OTHER

Participants was remain sat for passive recovery supervised by an independent therapist during the period when the other groups are received recovery strategies.

Interventions

Phototherapy

Photobiomodulation or photobiostimulation, this technique is the application of monochromatic light that can influence cellular activity through inhibition or stimulation of chemical and biological functions.

Intervention Type: OTHER

Placebo

The same procedures as in the active phototherapy group was applied to the placebo group; however, the emitter was disabled. The device was emit the same sounds regardless of the programmed mode (active phototherapy).

Intervention Type: OTHER

Passive recovery

Participants was remain sat for passive recovery supervised by an independent therapist during the period when the other groups are received recovery strategies.

Intervention Type: OTHER

Eligibility Criteria

Inclusion Criteria

• Healthy patient (self-report);
• Male gender;

Exclusion Criteria

• History of cancer;
• Smokers or alcoholics;
• Use drugs that influenced cardiac autonomic activity;
• Cardiovascular, metabolic or endocrine diseases;
• Occurrence of musculoskeletal injury during the study.

• Minimum Eligible Age: 18 Years
• Maximum Eligible Age: 30 Years
• Eligible Sex: MALE
• Accepts Healthy Volunteers: Yes

Sponsors

Paulista University

OTHER

Sponsor Role: lead

Responsible Party

Franciele Marques Vanderle

PhD - Clinical Professor

Responsibility Role: PRINCIPAL_INVESTIGATOR

Locations

Franciele Marques Vanderlei

Presidente Prudente, São Paulo, Brazil

Countries

Brazil

Other Identifiers

U1111-1214-0497

Identifier Type: -

Identifier Source: org_study_id