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During 1.9 m/s running, (A) grand mean spectral power in the 1.5- to 8.5-Hz band for all channels and subjects and (B) for all channels for each subject separately: before artifact removal (black); after channel-based artifact removal (gray); and after subsequent IC-based artifact removal (white). Error bars show ±SD. *P < 0.01; **P < 0.001.
