What training principle to you apply when you take a rest day after your HIIT
workout?
The Principle of Progression
The Principle of Recovery
The FITT Principle
The Principle of Tedium

breathe deeply from your lower lungs - imagine a rubber ring around your waist (your diaphragm)

breathe in and try to push the ring outwards.

breathe in through your nose and out through your nose and mouth.

explanation:

i believe it is true.