Wim Hof vs. HRV Breathing - Pranayama

A comparison of the Wim Hof method with heart rate variability resonant breathing, sorted into three categories of breath work: resonance, cleansing breath and breath holds. Explains why hyperventilation alone fails to oxygenate the muscles without carbon to exchange, why running or cold shivering helps, and how lengthening the breath leads toward the Tranquil Breath.