Constipation is a common complaint. The most common cause of constipation, gas, and other tummy troubles has to do with our unhealthy lifestyle. Poor eating choices, stress, and hectic schedules can manifest in your digestive system as hard stools (as well as loose stools) or infrequent bowel movements. Some yoga postures can manipulate a person’s digestive tract and may help relieve constipation by encouraging the digestive tract to pass stool or gas.