You are practicing this exercise correctly when you slow down and reduce your breathing sufficiently to create a tolerable need for air. The need for air signifies an accumulation of arterial carbon dioxide, the goal of which is to reset the respiratory center’s tolerance to this gas. To assist with this, it is very helpful to exert gentle pressure against your chest and abdomen with your hands. Try to maintain the need for air for the duration of 4 to 5 minutes.
