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

Not Applicable

Completed

• Conditions: Training; Phototherapy; Autonomic Nervous System
• Interventions: Other: Placebo; Other: Passive recovery; Other: Phototherapy

• Registration Number: NCT03566186
• Lead Sponsor: Paulista University

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%.

Detailed Description

Not available

Study Timeline

• Study Start: 2017-09-03
• Primary Completion: 2017-10-01
• Study Completion: 2017-12-19
• Study First Submitted: 2018-05-28
• Status Verified: 2018-06
• Study First Submitted QC: 2018-06-11
• Last Update Submitted: 2018-06-11
• Study First Posted: 2018-06-25
• Last Update Posted: 2018-06-25

Recruitment & Eligibility

• Status: COMPLETED
• Sex: Male
• Target Recruitment: 39

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.

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: PARALLEL

Arm && Interventions

Group	Intervention	Description
Placebo group	Placebo	(n=14) Phase 2 training + placebo phototherapy group
non-treatment control group	Passive recovery	(n=13) Phase 2 training + control group
Active phototherapy group	Phototherapy	(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).

Primary Outcome Measures

Name	Time	Method
Effects of phototherapy on adaptation and change of cardiac Autonomic modulation.	Baseline (captation of hear rate variability for 20 minutes) before 6 weeks (captation of hear rate variability for 20 minutes) and before 12 weeks (captation of hear rate variability for 20 minutes)	Analyzed and compare the effects of phototherapy with different light sources and wavelengths applied during training combined at heart rate variability

Secondary Outcome Measures

Name	Time	Method
Effects of phototherapy on recovery of cardiac Autonomic modulation.	During training sessions with higher energetic spending leaving for the last two weeks, composed of higher intensity - (captation of hear rate variability for 1 hour on phase 1 and phase 2).	Compare the effects of phototherapy with placebo group and control group at recovery after exercise of heart rate variability.
Effects of phototherapy on tracking daily of cardiac autonomic modulation.	daily, after exercise and before exercise (captation of hear rate variability for 7 minutes)	Analyze and compare the change in the indices of heart rate variability in tracking daily after combined training of sprints and squats

Trial Locations

Locations (1)

Franciele Marques Vanderlei; 🇧🇷 Presidente Prudente, SP, Brazil