Agnisar Pranayama : Appeases Your Stomach

Agnisar is an exercise to fine tune digestive system and metabolism.

Preparation

Sit on your favourite Asana ( Padma asana, Vajra asana or Sukh asana) in a well ventilated room free from any distractions. Keep the waist, back, neck and spine erect. If you problem sitting in these asanas, you can sit on a chair or sit cross legged on the yoga mat/ carpet keeping your back, neck and spine erect.

Inhale and fill your lungs to maximum capacity. Hold your breath and practice Moolbandh (Contracting the anus muscles upward towards the large intestines).
Exhale slowly. Now while holding your breath pull your abdomen muscles (navel) inwards towards your spine, then release your abdomen muscles. Without inhaling keep on doing this flapping movement for the stomach as long as you can hold breath. Keep holding the Moolbandh while you are flapping the abdomen muscles.
Release Moolbandh and inhale.
Practice this for 2-3 times. Gradually increase the repetitions.

This pranayama is prohibited for heart patients and people with high blood pressure. Also those who have undergone abdomen surgery should not do Agnisar pranayama.
Do not tax your body. Any time you feel discomfort, discontinue and take rest.