Key result
High-resistance cycle ergometer exercise significantly increased cortical activation and cortico-cortical coupling, including beta-band phase-locking values, during the late stage of exercise compared to low-resistance exercise.
Why the study?
Few studies have attempted to understand how exercise-state brain activity is modulated by exercise intensity.
Absolute Event Rate: 0.019% vs -0.082%
p-value: p=0.0147
High-resistance cycling may enhance late-stage cortical coupling; leaves open whether EEG metrics can guide intensity in clinical rehab.
BACKGROUND: EEGs are frequently employed to measure cerebral activations during physical exercise or in response to specific physical tasks. However, few studies have attempted to understand how exercise-state brain activity is modulated by exercise intensity. METHODS: Ten healthy subjects were recruited for sustained cycle ergometer exercises at low and high resistance, performed on two separate days a week apart. Exercise-state EEG spectral power and phase-locking values (PLV) are analyzed to assess brain activity modulated by exercise intensity. RESULTS: The high-resistance exercise produced significant changes in beta-band PLV from early to late pedal stages for electrode pairs F3-Cz, P3-Pz, and P3-P4, and in alpha-band PLV for P3-P4, as well as the significant change rate in alpha-band power for electrodes C3 and P3. On the contrary, the evidence for changes in brain activity during the low-resistance exercise was not found. CONCLUSION: These results show that the cortical activation and cortico-cortical coupling are enhanced to take on more workload, maintaining high-resistance pedaling at the required speed, during the late stage of the exercise period.
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Lin et al. (2021) studied Healthy (n=10). High-resistance cycle ergometer exercise vs. Low-resistance cycle ergometer exercise (Level 4, 70 W) was evaluated on Change in beta-band phase-locking value (PLV) for P3-P4 from early to late pedal stages (p=0.0147). High-resistance cycle ergometer exercise significantly increased cortical activation and cortico-cortical coupling, including beta-band phase-locking values, during the late stage of exercise compared to low-resistance exercise.
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