Exercise-induced changes in EEG alpha power depend on frequency band definition mode

Area of Science:

• Neuroscience
• Exercise Physiology

Background:

• Cortical alpha oscillations are key in cognitive processes.
• Standard practice often uses fixed alpha bands, ignoring individual alpha peak frequency (iAPF) recommendations.
• Previous work suggests exhaustive exercise elevates post-exercise iAPF.

Purpose of the Study:

• To investigate the impact of exhaustive exercise on post-exercise alpha power.
• To compare alpha power changes using fixed versus iAPF-adjusted alpha frequency bands.
• To determine if exercise influences alpha power analysis methods.

Main Methods:

• Resting electroencephalography (EEG) recorded from 13 scalp sites in nine participants.
• Recordings taken before, immediately after, and 10 minutes post-exhaustive cycling exercise.
• Alpha power calculated for both fixed and iAPF-adjusted lower and upper alpha bands.

Main Results:

• Lower alpha power significantly increased post-exercise in both fixed and iAPF-adjusted bands.
• Increased upper alpha power was observed only with the fixed frequency band.
• The rise in iAPF correlated positively with changes in fixed-band upper alpha power.

Conclusions:

• Exhaustive exercise demonstrably increases lower alpha power.
• Analysis of upper alpha power is sensitive to the chosen frequency band definition (fixed vs. iAPF).
• Researchers should exercise caution when interpreting exercise-induced alpha power changes due to methodological influences.