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BIBTEX RIS

Carbohydrate mouth rinse improves performance of mentally fatigued cyclists despite null effects on psychological responses

2023; Elsevier BV; Volume: 274; Linguagem: Inglês

10.1016/j.physbeh.2023.114428

1873-507X

Cayque Brietzke, Ítalo Vinícius, Wesley Alves Ribeiro, Paulo Estevão Franco‐Alvarenga, Raul Canestri, Gustavo César Vasconcelos, Florentina J. Hettinga, Tony Meireles Santos, Flávio Oliveira Pires,

Behavioral Health and Interventions

Mental fatigue reduces exercise performance through an impaired psychological response such as increased perceived exertion. Carbohydrate (CHO) mouth rinses improve exercise performance and perceived exertion likely due to an improved activation in cerebral reward areas, then we investigated if the CHO mouth rinse-improved exercise performance in mentally fatigued individuals was associated with ameliorated reward-related psychological responses. We hypothesised that CHO mouth rinse would be beneficial for mentally fatigued cyclists mainly in high-metabolic disturbance intensities. After familiarization and baseline sessions, well trained cyclists (n = 20) performed a maximal incremental test (MIT) after mental fatigue induction. They completed the MIT either without mouth rinse (MF) or rinsing their mouth with CHO (MF+CHO) or placebo (FM+PLA) solutions at every 25 % of the MIT. Psychological responses such as ratings of perceived exertion (RPE), affective valence, emotional arousal, and motivation were assessed throughout the MIT, while performance was assessed as peak power output and time of exercise. Mental fatigue reduced MIT performance (P < 0.05), but CHO mouth rinse was effective to counteract this deleterious mental fatigue effect (P < 0.05). However, we found null effects of CHO mouth rinses in psychological responses above the VT