Key result
High-intensity interval pedaling significantly increased EEG spectral power in the alpha and beta frequency ranges when changing cadences between 60 rpm and 120 rpm.
Why the study?
The central-governor model explains endurance exercise-induced central fatigue, but high-intensity exercise-induced central fatigue had not been investigated.
Does high-intensity intermittent pedaling alter neural response measured by EEG?
Does high-intensity intermittent pedaling alter neural response measured by EEG?
High-intensity interval pedaling alters neural responses and increases brain function regardless of fatigue, suggesting potential applications in treating psychotic disorders.
Answers are grounded in this paper and cite their sources.
Central fatigue mechanisms in high-intensity exercise remain unclear; leaves open whether EEG changes reflect performance limits.
INTRODUCTION: The central-governor model explains the mechanism of endurance exercise-induced 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.
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Ghorbani et al. (2019) studied Healthy active sprint cyclists (n=14). High-intensity interval pedaling vs. Low-intensity pedaling (60 rpm) and rest was evaluated on EEG spectral power in alpha and beta frequency ranges (p=<0.01). High-intensity interval pedaling significantly increased EEG spectral power in the alpha and beta frequency ranges when changing cadences between 60 rpm and 120 rpm.
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