As much as I love Rickson and his passion for the breath, he gives a very very dangerous advise: to hyperventilate before diving. As a freediver and breathworker, i need to stress that this will lead to shallow water blackouts. You do not get more oxygen in, but you expel more CO2, which stops you from getting the urge to breathe. You will not get the urge to breath and you blackout. This often results in death unless you have someone rescue you. Never ever hyperventilate when diving. If you want to push your limits, learn to get comfortable with contractions and the urge to breathe.
Big facts! Back in 2019 I was hospitalized for a while. I had stage 3 cancer and pulmonary embolism at the same time. I was stressed, felt toxic and miserable. One thing kept me going was my breathing exercise and mental relaxation. I notice while in ICU my stressed out thoughts was increasing my already fast beating heart. I let all negative thoughts go and became at peace with the universe. It wasnt easy by I prevailed!
please never ever hyperventilate before diving - I am an apnoe freediver - thats how swimming pool black outs are happening and people are falling unconscious without noticing and then drowning... Hyperventilation lowers the CO2 in the blood, The body does not track the O2 in the blood, it only has sensors for CO2 concentration (acidity of the blood). If the CO2 concentration is getting higher then a certain point the dive reflex kicks in and you feel the urge to breathe. If you have lowered your CO2 so much through hyperventilation, you might not get to that point where you notice you need to breathe and you run out of O2 before that point - making you fall unconscious without noticing. Please get adapted to the urge of breathing and train to relax into that, but never hyperventilate for a dive - unless you are on a specific training schedule with a qualified buddy in apnea freediving sports.
Rickson Gracie on The Importance of Learning to Breathe