Posted by mark.
Results > Posts Tagged With > free diving
Nov
11
Posted by mark.
Hold your breath for a moment.
In about 10 to 30 seconds you’ll be feeling a strong desire to take a breath. That’s not caused by lack of oxygen. It’s caused by excess carbon dioxide buildup in your blood.
[Ok you can breathe again.]
The trigger in mammals that causes us to want to take a breath is an excess buildup of CO2. In reptiles the trigger is lack of O2. Free divers don’t hyperventilate to get more O2 into their bloodstream. They …