Minimalist breathing exercise app for 5.5 seconds inhale and exhale.
Inhaling and exhaling for 5.5 seconds exercise is based on James Nestor research in book Breath: The New Science of a Lost Art.
“The perfect breath is this: Breathe in for about 5.5 seconds, then exhale for 5.5 seconds. That’s 5.5 breaths a minute for a total of about 5.5 liters of air.” ― James Nestor, Breath: The New Science of a Lost Art