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ORIGINAL RESEARCH article

Front. Neurosci.
Sec. Perception Science
Volume 18 - 2024 | doi: 10.3389/fnins.2024.1428901

Comparison of Alterations in Local Field Potentials and Neuronal Firing in Mouse M1 and CA1 Associated with Central Fatigue Induced by High-Intensity Interval Training and Moderate-Intensity Continuous Training

Provisionally accepted
Yuncheng Liu Yuncheng Liu Haojie Mao Haojie Mao Yaoyao Zhong Yaoyao Zhong Weiyi Lao Weiyi Lao Jihui Wang Jihui Wang Wei Ouyang Wei Ouyang *
  • Zhejiang Normal University, Jinhua, China

The final, formatted version of the article will be published soon.

    The mechanisms underlying central fatigue (CF) induced by high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) are still not fully understood. In order to explore the effects of these exercises on the functioning of cortical and subcortical neural networks, this study investigated the effects of HIIT and MICT on local field potential (LFP) and neuronal firing in the mouse primary motor cortex (M1) and hippocampal CA1 areas. HIIT and MICT were performed on C57BL/6 mice, and simultaneous multichannel recordings were conducted in the M1 motor cortex and CA1 hippocampal region. Results: A range of responses were elicited, including a decrease in coherence values of LFP rhythms in both areas, and an increase in slow and a decrease in fast power spectral density (PSD, n=7-9) respectively. HIIT/MICT also decreased the gravity frequency (GF, n=7-9) in M1 and CA1.Both exercises decreased overall firing rates, increased time lag of firing, declined burst firing rates and the number of spikes in burst, and reduced burst duration (BD) in M1 and CA1 (n=7-9).While several neuronal firing properties showed a recovery tendency, the alterations of LFP parameters were more sustained during the 10-min post-HIIT/MICT period. MICT appeared to be more effective than HIIT in affecting LFP parameters, neuronal firing rate, and burst firing properties, particularly in CA1. Both exercises significantly affected neural network activities and local neuronal firing in M1 and CA1, with MICT associated with a more substantial and consistent suppression of functional integration between M1 and CA1.Our study provides valuable insights into the neural mechanisms involved in exercise-induced central fatigue by examining the changes in functional connectivity and coordination between the M1 and CA1 regions. These findings may assist individuals engaged in exercise in optimizing their exercise intensity and timing to enhance performance and prevent excessive fatigue. Additionally, the findings may have clinical implications for the development of interventions aimed at managing conditions related to exercise-induced fatigue.

    Keywords: Exhausting exercise, primary motor cortex, hippocampal CA1, Local Field Potentials, neuronal firing

    Received: 07 May 2024; Accepted: 31 Jul 2024.

    Copyright: © 2024 Liu, Mao, Zhong, Lao, Wang and Ouyang. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

    * Correspondence: Wei Ouyang, Zhejiang Normal University, Jinhua, China

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