I'm sitting here reading about "Circular Breathwork" posted by ConservativeMind (another one of his/her great articles about health). It's fascinating how continuous, deep breathing without pauses between inhalation and exhalation may alleviate stress, anxiety, depression, and PTSD, while enhancing self-awareness and life satisfaction - things we can all use. (See Circular breathwork induces altered states of consciousness linked to improved mental health, Medical Xpress / Communications Psychology ^ | April 28, 2025 | Justin Jackson / Martha N. Havenith et al, Posted on 5/16/2025, 8:50:47 AM by ConservativeMind) Anyway, the article discusses reducing etCO2 (end-tidal CO2) levels from 34.3 mmHg...