Yoga nidra or yogic sleep is a guided mediation which allow the body to enter a deep state of relaxation. Studies has said that an hour long nidra session has the same restorative affect as 4 hours sleep. During a nidra session the aim is to move into a state of consciousness somewhere between wakefulness and sleep. Nidra has become a popular form of mind-body therapy. It is a systematic form of guided relaxation that typically is done for 35 to 40 minutes at a time. Practitioners say that it often brings immediate physical benefits, such as reduced stress and better sleep, and that it has the potential to heal psychological wounds. As a meditation practice, it can engender a profound sense of joy and well-being.