Props are used, without which it is difficult to maintain timings. As healthy blood flow occurs, the glands secrete mucus which coats the lining of the stomach or duodenum. The stretch of the vagus nerve is probably the most important mechanism in back bends which reduces acid flow. The normal effect of stimulation of the nervous system and mind by back bends does not occur as the poses are done with props and with the bandage on the eyes. A particular property of an asana is nullified, yet the asana is used.
Inversions promote a feeling of lightness in the organs at once.
They also help good absorption of food and elimination of excess wind in the system. Forward bends, though they quieten the mind, are contra-indicated, as they increase acidity with the vagus nerve being stimulated. They may be introduced after healing has occurred and the condition is under control with yoga alone. If drugs are still being used, forward bends should not be introduced. To relieve bloating, belching, fullness and acid burn after meals in both conditions, some asanas can be performed after food.