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

Paulista University

Status

Completed

Conditions

Training

Phototherapy

Autonomic Nervous System

Treatments

Other: Placebo

Other: Phototherapy

Other: Passive recovery

Study type

Interventional

Funder types

Other

Identifiers

NCT03566186

U1111-1214-0497

Details and patient eligibility

About

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%.

Enrollment

39 patients

Sex

Male

Ages

18 to 30 years old

Volunteers

Accepts Healthy Volunteers

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.

Trial design

Primary purpose

Other

Allocation

Randomized

Interventional model

Parallel Assignment

Masking

Triple Blind

39 participants in 3 patient groups, including a placebo group

Active phototherapy group

Experimental group

Description:

(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).

Treatment:

Other: Phototherapy

Placebo group

Placebo Comparator group

Description:

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

Treatment:

Other: Placebo

non-treatment control group

Other group

Description:

(n=13) Phase 2 training + control group