Effects of phototherapy applied in a combined SPRINT and squat training on blood lactate and aerobic endurance

• Grant number: 19/19131-4
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: June 01, 2020
• End date: December 31, 2020
• Field of knowledge: Health Sciences - Physiotherapy and Occupational Therapy
• Principal Investigator: Carlos Marcelo Pastre
• Grantee: Catarine Teixeira da Cruz
• Host Institution: Faculdade de Ciências e Tecnologia (FCT). Universidade Estadual Paulista (UNESP). Campus de Presidente Prudente. Presidente Prudente , SP, Brazil

Abstract

Phototherapy has been approached with emphasis on post-exercise recovery, being one of the physical therapy methods used to protect muscle tissue and optimize the recovery process. However, it is still unclear whether its application in periodic training has any effect on biological markers and performance. Objective: To analyze the effect of phototherapy applied with different light sources (LLLT and LEDT) in a combined sprint and squat training on aerobic endurance and blood lactate. Method: The study will consist of 36 male participants, allocated from a stratified randomization into three groups: active phototherapy (G1), placebo phototherapy (G2) and control (G3). Participants will undergo a combined sprint and squat training performed twice a week for 12 weeks. The training will be divided into two phases. Phase 1 will be adaptation, in which participants will perform 6 weeks of combined training. After phase 1 stratified randomization based on adaptive capacity will be performed. In phase 2 composed of 6 weeks, the recuperative interventions will be applied between sprint and squat training, according to the group to which each participant was allocated. Basal blood lactate concentration and at minutes 1, 5, 7, 9, 15 after an incremental aerobic resistance test on the treadmill will be analyzed as a biological marker, as well as the participants' performance during the exercise. For data analysis will be used the statistical package SPSS 19.0 and considered 5% of significance. (AU)