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. 2023 Jan 23;13:1017350. doi: 10.3389/fphys.2022.1017350

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Copyright © 2023 Natarajan.

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) and the copyright owner(s) 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.

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RR interval data (mean subtracted) from a participant at rest (A) and during Chi meditation (B). RSA is noticeably present in both plots, but is dominant in (B). Plot (C) shows the ABI computed from 2 min of data. The red data points are plotted for the waveform in (A), while the green data points are plotted for the waveform in (B). The ABI = .5 line is an approximate boundary that separates focused meditation from other activities.