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Yes as a matter of fact.. when you hold your breath for longer time your brain starts becoming hypoxic and you start feeling sleepy and eventually pass out.. but that's how far your brain allows you to go voluntarily.. After this your brain takes over and starts breathing while you are unconscious. Views Â· View Upvotes.
Take a breath and hold it for as long as possible. Assume a comfortable seated position and take a deep breath, filling your lungs to about 80-85% of capacity. Hold your breath for as long as possible, staying completely still to avoid expending unnecessary energy and wasting oxygen. Once this is done, take a breath and hold it for two minutes and thirty seconds, timing it on a stopwatch. 2  Do not attempt to hold your breath for any longer than this. 3  Once the time is up, exhale to release the used air and take three semi-purge breaths.