Mula bandha (Root lock = one of the three locks).
Engaging the Mula bandha is perhaps one of the most powerful and fruitful actions a man can perform. The basis of this bandha is to lift up the sexual energy and vitality from the lower chakras (Energy Centers).
For men, the contraction happens in the area between the anus and the genitals lifting the perineum up towards the abdomen. Mula bandha can be engaged from 10 to 100 percent of the contraction and can either be held for as long as possible or used by rhythmically engaging and releasing the contraction with the breath (Pranayama).
This kind of action can lead you to have more sexual control by moving sexual energy back into flow. It can be effectively employed in your asana practice.
Whenever you have a spare five minutes engage Mula bandha, lift it up! You will become a superman!