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Evaluation of the effects of photobiomodulation therapy on parameters of muscle activity, time to exhaustion in constant-load severe-intensity cycling and on the peripheral and central aspects of muscle fatigue

Grant number: 17/11255-0
Support Opportunities:Scholarships in Brazil - Master
Effective date (Start): August 01, 2017
Effective date (End): February 28, 2019
Field of knowledge:Health Sciences - Physical Education
Principal Investigator:Alessandro Moura Zagatto
Grantee:Yago Medeiros Dutra
Host Institution: Faculdade de Ciências (FC). Universidade Estadual Paulista (UNESP). Campus de Bauru. Bauru , SP, Brazil


There is a constant search in the sports environment for resources that if used chronically and/or immediately before the competitions, will promote a greater capacity to produce and/or use energy during a physical effort. Photobiomodulation therapy (PBMT) has been identified as a promising resource in this scenario, given its ability to optimize the aerobic energy production pathway, improve tissue perfusion and alleviate the pain and/or discomfort generated by the exercise.However, the effects of PBMT on the performance of activities with motor movements similar to those observed on the sports scene are controversial, its repercussions on muscular work during this type of effort are not described in the literature, as well as its influence on the aspects of central and peripheral muscle fatigue.Thus, the aim of the present study will be to investigate the effects of PBMT on parameters of muscular activity, time to exhaustion in a constant-load severe-intensity cycling, and central and peripheral aspects of muscle fatigue, verifying two doses of PBMT. For this, the volunteers will perform three constant-load severe-intensity cycling until exhaustion, at different days, preceded at each day by a dose of PBMT, 0 J (control) or 210 J or 315 J, randomly and double blinding selected. All the efforts will be performed with the monitoring of the kinetics of blood lactate concentrations and blood pH level, muscle electrical activity and muscle discomfort. Before and after the efforts, will also be executed supramaximal electrical stimulation of the femoral nerve, at rest and during maximal isometric voluntary contractions of the knee extensors of the dominant lower limb, associated with the monitoring of the strength level (Twitch interpolation technique) and features of muscle activation, in order to investigate, respectively, central and peripheral aspects of muscle fatigue. (AU)

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Scientific publications (5)
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
DUTRA, YAGO MEDEIROS; FIALHO LOPES, VITHOR HUGO; PINHEIRO BRISOLA, GABRIEL MOTTA; DIEFENTHAELER, FERNANDO; ZAGATTO, ALESSANDRO MOURA. Rectus femoris activation is modified by training status and correlates with endurance performance in cycling. SPORT SCIENCES FOR HEALTH, v. N/A, p. 11-pg., . (17/11255-0)
MALTA, ELVIS S.; BRISOLA, GABRIEL M. P.; DE POLI, RODRIGO A. B.; DUTRA, YAGO M.; FRANCHINI, EMERSON; ZAGATTO, ALESSANDRO M.. Metabolic Profile and Performance Responses During Two Consecutive Sessions of Sprint Interval Training. JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, v. 34, n. 4, p. 1078-1085, . (17/11255-0, 15/05012-2, 16/17836-2, 17/03660-2)
BRISOLA, GABRIEL M. P.; CLAUS, GABRIEL M.; DUTRA, YAGO M.; MALTA, ELVIS S.; DE POLI, RODRIGO A. B.; ESCO, MICHAEL R.; ZAGATTO, ALESSANDRO M.. Effects of Seasonal Training Load on Performance and Illness Symptoms in Water Polo. JOURNAL OF STRENGTH AND CONDITIONING RESEARCH, v. 34, n. 2, p. 406-413, . (17/21724-8, 17/11255-0, 17/03660-2, 16/17836-2, 17/14187-6)
ZAGATTO, ALESSANDRO M.; CLAUS, GABRIEL M.; DUTRA, YAGO M.; DE POLI, RODRIGO A.; LOPES, VITHOR H. F.; GOODALL, STUART; LOTURCO, IRINEU; BOULLOSA, DANIEL. Drop jumps versus sled towing and their effects on repeated sprint ability in young basketball players. BMC SPORTS SCIENCE MEDICINE AND REHABILITATION, v. 14, n. 1, . (17/11255-0, 19/22726-0, 17/14187-6)
DUTRA, YAGO MEDEIROS; CLAUS, GABRIEL MACHADO; MALTA, ELVIS DE SOUZA; SEDA, DANIELA MORAES DE FRANCO; ZAGO, ANDERSON SARANZ; CAMPOS, EDUARDO ZAPATERRA; FERRARESI, CLEBER; ZAGATTO, ALESSANDRO MOURA. Photobiomodulation 30 min or 6 h Prior to Cycling Does Not Alter Resting Blood Flow Velocity, Exercise-Induced Physiological Responses or Time to Exhaustion in Healthy Men. FRONTIERS IN PHYSIOLOGY, v. 11, . (17/21724-8, 17/11255-0, 17/14187-6)
Academic Publications
(References retrieved automatically from State of São Paulo Research Institutions)

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