Wim Hof Breathing - Pulse Oximeter Data - 2nd Round ONLY

I was curious to see how my heartrate and 02 levels were affected during my breathwork practice. 30 Deep breaths, followed by a prolonged breath hold - 15 sec recovery breath, repeat for 1-5 rounds :) it was tough to film and remain out of thought, I tried my best and still managed to pull of a decent breath hold .. The results were cool ! this was recorded during my round 2 breath hold. Enjoy