Digestive breathing is a simple but effective practice that can often help promote digestion. This exercise is based on using your hands to stimulate energy points related to the spleen and stomach meridians (energy pathways described in Chinese medicine), while you simultaneously breathe deep into your belly.
Sit on a firm chair with your spine erect, yet relaxed, and your feet flat on the floor in front of you. Place your hands on your knees with the heel of your hands above your knee caps and your fingers pointed downward. Use your fingers, especially your index finger, middle finger, and ring finger, to find three indentations in your knee where the fingers can comfortably fit. Your middle finger will be over the center of the knee cap. Now simply keep your hands there, using just a slight pressure to stimulate the meridians running through the knee area. Sense the warmth going into your knees from your hands. As you inhale, sense that you are breathing energy gently into your expanding belly. As you exhale, sense your belly naturally contracting. Do not use force. Work with your breathing in this way for at least five minutes after each meal, or any time you have minor digestive problems.
This exercise is from The Tao of Natural Breathing: For Health, Well-Being and Inner Growth. Copyright © 1997 by Mountain Wind.