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

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

Interventions

OTHER

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.

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).

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.

Sponsors & Collaborators

• Paulista University

  lead OTHER

Study Design

Allocation

RANDOMIZED

Purpose

OTHER

Masking

TRIPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

30 Years

Sex

MALE

Healthy Volunteers

Yes

Timeline & Regulatory

Start

2017-09-03

Primary Completion

2017-10-01

Completion

2017-12-19

Countries

• Brazil

Study Locations