Yoga Nindra is a meditative practice for deep relaxation and healing.  The benefits of it range from healing physical and emotional ailments, all the way to unitive Oneness and spiritual awareness.  It is a practice that does not require any prior meditation experience, and it ultimately seeks to reconnect you with your deepest core of being.  It is a practice that is best done on an empty stomach, and some of the highest benefits of it can occur while fasting.  One hour of yoga nidra is equivalent to about 4 hours of sleep.