Effects of carbohydrate mouth rinse on physical performance and psychophysiological responses in individuals mentally fatigued during VO2MAX test

• Grant number: 16/16496-3
• Support Opportunities: Regular Research Grants
• Start date: June 01, 2017
• End date: May 31, 2019
• Field of knowledge: Health Sciences - Physical Education
• Principal Investigator: Flávio de Oliveira Pires
• Grantee: Flávio de Oliveira Pires
• Host Institution: Escola de Artes, Ciências e Humanidades (EACH). Universidade de São Paulo (USP). São Paulo , SP, Brazil
• Associated researchers: Fernando Henrique Magalhães

Abstract

The mental fatigue is defined as a psychophysiological alteration, which may further induce alterations in physical performance. One hypothesis is that mental fatigue increases the ratings of perceived exertion (RPE), thus reducing the physical performance capacity. It has been suggested that mental fatigue may deactivate cerebral regions involved with motor planning and command, which are further associated with RPE generation. In contrast, the carbohydrate (CHO) mouth rinse is suggested as an ergogenic, as it may improve physical performance. Interestingly, its effects on physical performance seem to occur through an activation in the same cerebral areas deactivated by metal fatigue. This study will verify if the CHO mouth rinse may attenuate or reverse the mental fatigue effects on physical performance and traditional indexes related to aerobic status. Twenty participants will perform a maximal incremental test (MIT), conventionally used for VO2MAX measures, on a cycle ergometer, following the conditions: 1) familiarization with instruments and MIT; 2) preliminary MIT; 3) mental task + MIT; 4) mental task + MIT + CHO mouth rinse; 5) mental task + MIT + placebo mouth rinse. Variables from MIT will be peak power output (WPEAK), VO2MAX, ventilatory thresholds, RPE, motivation (MOT) and activation (ATI). The cerebral activity will be verified through electroencephalography (EEG) records before and after each MIT. Repeated-measures ANOVA will check for alterations in performance and psycho (RPE, MOT e ATI) physiological (VO2MAX and ventilatory thresholds) during MIT, while Oneway ANOVA will check for alterations in cerebral activation. (AU)

Scientific publications

(10)

(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)

CANESTRI, RAUL; FRANCO-ALVARENGA, PAULO ESTEVAO; BRIETZKE, CAYQUE; VINICIUS, ITALO; SMITH, SAMUEL A.; MAUGER, ALEXIS R.; GOETHEL, MARCIO FAGUNDES; PIRES, FLAVIO OLIVEIRA. Effects of experimentally induced muscle pain on endurance performance: A proof-of-concept study assessing neurophysiological and perceptual responses. PSYCHOPHYSIOLOGY, v. 58, n. 6, MAR 2021. (16/16496-3)

VIANA, BRUNO FERREIRA; TRAJANO, GABRIEL S.; UGRINOWITSCH, CARLOS; PIRES, FLAVIO OLIVEIRA. Caffeine increases motor output entropy and performance in 4 km cycling time trial. PLoS One, v. 15, n. 8, AUG 13 2020. (16/16496-3, 10/01317-0)

BRIETZKE, CAYQUE; FRANCO-ALVARENGA, PAULO ESTEVAO; CANESTRI, RAUL; GOETHEL, MARCIO FAGUNDES; VINICIUS, ITALO; PAINELLI, VITOR DE SALLES; SANTOS, TONY MEIRELES; HETTINGA, FLORENTINA JOHANNA; PIRES, FLAVIO OLIVEIRA. Carbohydrate Mouth Rinse Mitigates Mental Fatigue Effects on Maximal Incremental Test Performance, but Not in Cortical Alterations. BRAIN SCIENCES, v. 10, n. 8, AUG 2020. (16/16496-3)

BRIETZKE, CAYQUE; VINICIUS, ITALO; FRANCO-ALVARENGA, PAULO ESTEVAO; CANESTRI, RAUL; GOETHEL, MARCIO FAGUNDES; RODRIGUES SANTOS, LUCAS EDUARDO; VIANA, BRUNO; SANTOS, TONY MEIRELES; PIRES, FLAVIO OLIVEIRA. Proof-of-Concept and Test-Retest Reliability Study of Psychological and Physiological Variables of the Mental Fatigue Paradigm. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH, v. 18, n. 18, SEP 2021. (16/16496-3)

FRANCO-ALVARENGA, PAULO ESTEVAO; BRIETZKE, CAYQUE; CANESTRI, RAUL; GOETHEL, MARCIO FAGUNDES; HETTINGA, FLORENTINA; SANTOS, TONY MEIRELES; PIRES, FLAVIO OLIVEIRA. Caffeine improved cycling trial performance in mentally fatigued cyclists, regardless of alterations in prefrontal cortex activation. Physiology & Behavior, v. 204, p. 41-48, MAY 15 2019. (16/16496-3)

BRIETZKE, CAYQUE; FRANCO-ALVARENGA, PAULO ESTEVAO; COELHO-JUNIOR, HELIO JOSE; SILVEIRA, RODRIGO; ASANO, RICARDO YUKIO; PIRES, FLAVIO OLIVEIRA. Effects of Carbohydrate Mouth Rinse on Cycling Time Trial Performance: A Systematic Review and Meta-Analysis. SPORTS MEDICINE, v. 49, n. 1, p. 57-66, JAN 2019. (16/16496-3)

PIRES, FLAVIO O.; SILVA-JUNIOR, FERNANDO L.; BRIETZKE, CAYQUE; FRANCO-ALVARENGA, PAULO E.; PINHEIRO, FABIANO A.; DE FRANCA, NANCI M.; TEIXEIRA, SILMAR; SANTOS, TONY MEIRELES. Mental Fatigue Alters Cortical Activation and Psychological Responses, Impairing Performance in a Distance-Based Cycling Trial. FRONTIERS IN PHYSIOLOGY, v. 9, MAR 16 2018. (16/16496-3)

FRANCO-ALVARENGA, PAULO ESTEVAO; BRIETZKE, CAYQUE; CANESTRI, RAUL; GOETHEL, MARCIO FAGUNDES; VIANA, BRUNO FERREIRA; PIRES, FLAVIO OLIVEIRA. Caffeine Increased Muscle Endurance Performance Despite Reduced Cortical Activation and Unchanged Neuromuscular Efficiency and Corticomuscular Coherence. NUTRIENTS, v. 11, n. 10, OCT 2019. (16/16496-3)

PIRES, FLAVIO O.; DOS ANJOS, CARLOS A. S.; COVOLAN, ROBERTO J. M.; FONTES, EDUARDO B.; NOAKES, TIMOTHY D.; GIBSON, ALAN ST CLAIR; MAGALHAES, FERNANDO H.; UGRINOWITSCH, CARLOS. Caffeine and Placebo Improved Maximal Exercise Performance Despite Unchanged Motor Cortex Activation and Greater Prefrontal Cortex Deoxygenation. FRONTIERS IN PHYSIOLOGY, v. 9, AUG 17 2018. (16/16496-3, 15/13096-1)

PIRES, FLAVIO OLIVEIRA. Lessons from a broad view of science: a response to Dr Robergs' article. BMJ OPEN SPORT & EXERCISE MEDICINE, v. 4, n. 1, p. 5-pg., 2018-03-01. (16/16496-3)