Nauli

The 15th century Hatha Yoga Pradipika claims that Nauli (magically) removes all diseases.

Nauli is an exercise of classical hatha yoga; it is not often taught in yoga as exercise. There are four steps, which are learned one after another:

1. the abdominal lock, uddiyana bandha: the lungs are emptied, and the abdomen is pulled inwards and upwards under the lower edge of the ribcage
2. madhyana nauli: only the central muscles of the abdomen are contracted
3. vama nauli: only the left muscles of the abdomen are contracted
4. daksina nauli: only the right muscles of the abdomen are contracted.