Pran mudra is said to activate the root chakra. In root chakra the elemental force of human entity resides. The finger position of this mudra provokes the nourishing energy in the pelvic floor.

Pran mudra is exercised with both hands. The tips of the thumbs, ring fingers and little fingers are placed together and the other fingers remained extended. This mudra is performed either five to thirty minutes per day or three times a day as a course of treatment.
According to Kim Da Silva, while performing Pran Mudra, the thumb can be put onto the fingernails of the other two fingers instead of on their tips. This leads to the left and the right brain hemispheres function effectively and leaves them active.
Benefits Of Pran Mudra:
The Pran mudra increases vitality.
Practicing the mudra can lead to diminution of fatigue and nervousness and improves vision.
This mudra is effective in treating eye diseases.
On mental emotional level, this mudra elevates the staying power and assertiveness, self confidence and renders courage.
This mudra promotes the mental outlook and advances structured thoughts and ideas.
Pran Mudra leads to conscious, slow and gentle way of breathing is effective in stabilizing and calming the inner cognizance.