Abstract
Background
The central governor model putatively explains the mechanism of endurance exercise-induced central fatigue, however high-intensity exercise-induced central fatigue strategies have not been investigated yet. This study aimed to examine how central fatigue affects neural response alterations, as measured by electroencephalographic (EEG) recordings, in intermittent high-intensity cycling.
Methods
Neural responses were assessed by measuring the alteration of brainwaves based on spectral energy band estimates during an intermittent, high-intensity, 60-min exercise bout on a cycle ergometer. The cycle ergometer incline was changed every 10 min in an intermittent pattern (10-20-5-20-5-10°). EEG was used to analyze altering brain function. Heart rate (HR), blood lactate (BL), and rating of perceived exertion (RPE) were measured after the participants completed each change in incline.
Results
The results showed that HR, BL, and RPE increased at an incline of 20° in comparison to a 5° incline. The spectral power of EEG was significantly increased (P ˂ 0.01) in the alpha and beta frequency ranges with a change in inclines between 5 and 20°. The spectral power of the EEG was significantly increased (P ˂ 0.01) over the whole frequency range from rest (theta + 251%, alpha + 165%, beta + 145%).
Conclusion
Higher, relative intensities (10 and 20°) increased brain function, regardless of fatigue occurrence. HIIT (high-intensity interval training) led to an alteration in the neural response. Further work investigating the usefulness of HIIT to improve brain function is warranted.
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Change history
25 January 2024
This article has been retracted. Please see the Retraction Notice for more detail: https://doi.org/10.1007/s10072-024-07337-7
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The ethics committee of the Medical Faculty of the Azad University of Science and Research Branch of Tehran confirmed this study by the number of IR.IAU.PS.REC. 1397-115, and all aspects of this study were performed in accordance with the Declaration of Helsinki.
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Ghorbani, M., Clark, C.C.T. RETRACTED ARTICLE: Brain function during central fatigue induced by intermittent high-intensity cycling. Neurol Sci 42, 3655–3661 (2021). https://doi.org/10.1007/s10072-020-04965-7
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DOI: https://doi.org/10.1007/s10072-020-04965-7