Hey Mark,
A year ago (almost to the day) I was in your same boat. I had the flu but went to my first freedive club meeting (YMCA Kona, Hawaii) and got involved with this apnea stuff. I went to the pool (by myself, big no no) tried a static, made it to 2:15. Met some people to train with in Feb. Also not knowing what a breathe up was, but was detemined to figure this crap out. I hit every web site I could find, talked with everyone involved in deep freediving I could talk to and 6 months later I was on the U.S. National Team. Please understand I'm not trying to brag, but I was able to take info from all the people and all the web sites and put it all together to make it work for me. FD48 and Hennie are both right listen to your body, if it needs air you'll know. Start really paying attention to how you feel at the point where you think you need air. Don't panic, relax and pay attention. Some people can over ride thier feelings and thats when they get in trouble. Try different breathing techniques until you find one that works for you. Don't rush!
A breathe up is a sequence of slow deep breaths starting from your belly and extending up into your chest also called a ventelation. This should not be labored. It should be as full, but comfortable as possible. It should be a longer exhale than inhale.
You should put some purges in near the end. Not a lot, but a few to blow off the excess CO2 build up. A purge is the same as a ventelation, but quicker, like blowing out a candle. Also longer exhale than inhale. If you start to feel tingling you should start your breath hold as soon as you feel it. NEVER DO THIS ALONE!
Hope this helps.
Remember take it slow.
DSV
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