Yogic mantras to help keep the body, mind and spirit in total harmony. It can be practised in any sitting posture, which is the preferred way for this practice, but it can also be practised whilst sitting on a chair. Yoga Nidra is derived from the tantras by Swami Satyananda and is a powerful technique in which you learn to relax consciously. It is a deep and healing relaxation and thirty minutes of Yoga Nidra is as restful as almost four hours of conventional sleep. It is practised lying down on the floor. Meditation reduces stress and mental tension and induces calmness of the mind. If practised on a regular basis the mind will become progressively tranquil and one-pointed.