he 4-7-8 Breathing Exercise
The technique is shockingly simple, takes hardly any time, and can be done anywhere in five steps. Although you can do the exercise in any position, it’s recommended to sit with your back straight while learning it.
Weil explains to “place the tip of your tongue against the ridge of tissue just behind your upper front teeth and keep it there through the entire exercise. You will be exhaling through your mouth around your tongue; try pursing your lips slightly if this seems awkward.”