Breathing is important in any form of exercise.
Executive Tai Chi includes breathing exercises which slow down breathing , thus reducing the respiratory rate (rate of breaths
This washes out the lactic acids (produced as a by product of exercise) and causing alertness and relaxation.
The slowing of respiratory rate causes BP and heart rate to fall and is beneficial to the heart.
It also relieves stress by reducing muscle tension and improving oxygen delivery to the tissues.
It is done as a part of the Cool down.