In Hatha Yoga, basti is one of the six cleansing acts. As described in Hatha Yoga Pradipika (II. 26), Yoga experts practiced basti in a river with water reaching upto the navel. It is a highly effective enema for colon cleansing. Bansi Enema Process A tube such as a lotus stalk would be inside the rectum, while standing in the waist pose (Utkatasana), bending the knees slightly, keeping the hands pressed on the knees. After a deep expiration the student performed nauli madhyama by pulling the abdominal wall back and isolating the abdominal recti with a slight push below the navel, keeping the wall of the abdomen relaxed. This created a vacuum inside the abdominal cavity, due to which water was sucked inside the rectum through the tube. Thus basti is a sort of yogic enema in which water rushes up to the caecum from where the colon begins. After two or three repetitions, nearly half a liter of water can be sucked in. Then the tube may be taken out, and after rolling t