TAP Editorial Team. TAP reading note: Comparing the Effects of Square, 4–7-8, and 6 Breaths-per-Minute Breathing Conditions on Heart Rate Variability, CO2 Levels, and Mood. The Allostasis Project. Updated 2026-11-13. TAP-RDN-0080, v1.0 (English). https://tcite.org/TAP-RDN-0080/v1.0