This is kind of the basis of an entire field of yoga called Pranayama. Its translation varies, but can be roughly translated as breath control. A lot of it is

This is kind of the basis of an entire field of yoga called Pranayama. Its translation varies, but can be roughly translated as breath control. A lot of it is breathing slower, or faster than your body requires (including retention of breath, or holding with no air in the lungs), in order to elicit mental and physical states. Another example of this is Wim Hof, where you over breathe intentionally and then hold the breath for extended periods. Breath is a really interesting topic, being an autonomous system for the most part, but one which we can take voluntary control over. If you are interested in learning more, I'd recommend the book "Breath: The New Science of a Lost Art" by James Nestor. Edit: After trying the meditation, I also found it was a little quick if I was trying to sync my breathing to the dot. It may be intentional if the aim is to improve focus and alertness for an upcoming task, rather than relaxation!