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1- Azad university
INTRODUCTION: The central-governor model was considered explaining the mechanism of endurance exercise-induced central fatigue, but high-intensity exercise-induced central fatigue has not been investigated yet. The aim of this study was to investigate how central fatigue during high intensity intermittent pedaling lead to altering the neural response which results in electroencephalography (EEG) recordings.
Methods: We assessed neural response by measuring the alternation of brainwaves 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: The results showed that HR, BL, and RPE increased at a cadence of 120 rpm in compared with 60 rpm on the ergometer cycle. The spectral power of EEG, according to cadence × brainwaves was significantly increased (P˂0.01) in the alpha and beta frequency ranges with a change in cadences between 60 and 120 rpm. The spectral power of the EEG was significantly increased (P˂0.01) over the whole frequency range from rest to warming (theta: 251%, alpha: 165%, beta: 145%) and was significantly reduced in theta, alpha and beta (Theta: 176%, alpha: 142%, beta: 77%) (p≤0.01).
Conclusion: High intensities (90 and 120 cadences) increased brain function, regardless of fatigue occurrence. HIIT led to altering the neural response. It would be required investigating the usefulness of HIIT to treat some of the psychosis disorders.

Type of Study: Original | Subject: Behavioral Neuroscience
Received: 2018/12/22 | Accepted: 2019/06/30

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