Diaphragmatic breathing or abdominal breathing engages the stomach, abdominal muscles, and diaphragm when breathing. Practising it daily can help to slow down the heart rate and stabilize blood pressure.
Step 1: Lie comfortably on a flat surface with a pillow beneath your knees and head.
Step 2: Relax yourself, then put one hand above the belly button and the other hand on the chest.
Step 3: Inhale through your nose for 2 seconds and notice how your stomach rise as you breathe.
Step 4: Slowly exhale through your mouth engaging your stomach muscles, pushing all the air out of the belly. Repeat this exercise 10 times a day.