how to put 4-7-8 into practice
Step one: Find a comfortable place to sit with your back straight.
Step two: Place your tongue against the back of your teeth and keep it there.
Step three: Exhale completely through your mouth around your tongue, making a whoosh sound. It may help to purse your lips.
Step four: Close your lips and inhale through your nose for a count of four.
Step five: Hold your breath for a count of seven.
Step six: Exhale completely through your mouth making a whoosh sound for a count of eight.
Step seven: This completes one cycle. Repeat for three more cycles.