altered neural response induced by central-fatigue in the cortical area during high-intensity interval pedaling

Introduction: the central-governor model explains the mechanism of endurance exerciseinduced central fatigue, but high-intensity exercise-induced central fatigue has not been investigated yet. this study aimed to research how central fatigue during high-intensity intermittent pedaling alters the neural response, which results in electroencephalography (eeg) recordings. methods: we assessed neural response by measuring the alternation of brainwave spectral power during an intermittent high-intensity 60-minute exercise on an ergometer cycle. the cadences were changed every 10 minutes according to intermittent pattern altering (90-120- 60-120-60-90 rpm). eeg was used to analyze altering brain function. heart rate (hr), blood lactate (bl), and rating of perceived exertion (rpe) were measured after the change in cadences. results: hr, bl, and rpe increased at a cadence of 120 rpm compared with 60 rpm on the ergometer cycle. the spectral power of eeg, according to cadence × brainwaves, significantly increased (p˂0.01) in the alpha and beta frequency ranges with a change in cadences between 60 rpm and 120 rpm. the spectral power of the eeg significantly increased (p˂0.01) over the whole frequency range from rest to warming (theta: 251%, alpha: 165%, beta: 145%) and significantly reduced in theta, alpha, and beta (theta: 176%, alpha: 142%, beta: 77%) (p≤0.01). conclusion: high-intensity exercises (90 and 120 cadences) increased brain function, regardless of fatigue occurrence. high-intensity interval training (hiit) led to altering the neural response. it would be required to investigate the usefulness of hiit to treat some of the psychotic disorders.