Breath hold is not just a physical but also a psychological challenge. To minimize brain activity and oxygen consumption, it is necessary to achieve a state of consciousness free from extraneous thoughts, which will reduce carbon dioxide production. The main goal is to relax and control your mind to avoid anxiety and unnecessary thoughts.
By focusing on relaxation and using exercises, you can give your mind something to do that allows you to detect and relieve any physical tension that builds up during breath hold. If your attention starts to wander, you need to gently return it to the task of relaxing, maintaining control.
Freedivers often compare breath holds to meditation, as it provides direct feedback about the state of the body and mind. Failure to remain calm can lead to premature termination of breath hold.
Professionals in
freediving use diaphragm contractions as a cue to assess their progress. If they know they could safely hold their breath until four contractions before, then next time they can try to increase their breath hold by one or two contractions.