Before holding your breath, breathe in and out "slowly", from deep inside your diaphragm. This way, you are expelling low-quality air from your lungs. Inhale for five seconds, then hold your breath for one second, before exhaling for ten seconds. Continue to breathe deeply for two minutes, and make sure that as you exhale, you push out all the last "remaining" air.
As you exhale, push your tongue up to touch your teeth. This will form a valve, which helps control the breathing of the air out. Your inhalation should make the wind hissing as if you were breathing out.
Deep breathing allows your body to absorb more oxygen, compared to normal, and store it in your blood cells. This helps when you hold your breath and your body can use the stored oxygen to continue its functions, even when you are not breathing again.
Removes CO2 from your lungs. When you hold your breath, the pressure you feel in your lungs is not the result of the need to breathe, but the result of the amount of CO2 that is being released, compressed to be released. This formation of CO2 becomes more and more uncomfortable over time. To minimize this CO2 generation, it is necessary to purify any previously existing CO2 in your lungs, before holding your breath. Let's do this:
Exhale forcefully, pushing as much air out of your lungs as possible. Puff your cheeks while doing this, and imagine you are trying to blow into a toy sailboat to move it across the water.
When you fully exhale, inhale quickly and repeat. Try to keep your body as still as possible while doing this, to avoid expending any of the stored oxygen from the previous steps.
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Inhale and hold for one minute and thirty seconds. This is a training process that allows your body to adjust to the feeling of no air. Use a stopwatch to count down for 90 seconds, and don't try to hold your breath for longer than this.
When you breathe in, don't inhale so much that your body seems to want to explode. This will put pressure on your body and cause you to consume more energy. Instead, fill only 80-85% of your lung capacity so you still have some space to relax.
When the 90 seconds are up, exhale quickly to free your lungs from the used air, then do three breaths, inhale and exhale completely. This is known as a semi-purification process.
Repeat the process of deep breathing and purification, then hold the breath for two minutes and thirty seconds. When the first 90 seconds of exercise is over, repeat the deep breathing and purging exercises. Do each exercise at intervals of one minute and thirty seconds.
When the process is complete, inhale and hold your breath for two minutes and thirty seconds, timing it with a stopwatch. Don't try to hold your breath for longer than that.
When the time is up, exhale to release the used air and go through the semi-purification three times. Do this with two minutes of deep breathing and one minute and thirty seconds of purification. Now you're ready to try holding your breath for as long as you can.