Ajapa Japa incorporates awareness of breath, internal psychic passages and Mantra. It is a complete Sadhana in which the Mantra So Ham, which corresponds to the subtle sound of the breath, is applied. Antar Mouna works with the activities of the waking consciousness. The practitioner learns to witness his thoughts and feelings in a neutral way and realizes how he can progressively reduce the congestion of the mind and bring about calmness and develop concentration. Satyananda Yoga Nidra® is both a systematic deep relaxation technique and a tantric meditation. It provides a systematic method to induce complete physical, mental and emotional relaxation. Satyananda Yoga Nidra is practiced lying on the back in Shavasana (corps pose) and one appears to be asleep. However, the consciousness functions at a deeper level of awareness allowing mental blockages to be removed so that the inner potential of the practitioner can unfold. One of the hallmarks of the system of yoga developed by Swami Satyananda, is a series of 20 Kundalini Kriya techniques. The word "Kriya" means activity which refers to specific movements of consciousness which is one of the key components of the Kriya Yoga system. It is an advanced system of yoga to access the psychic or spiritual dimension of human existence. On a practical level it aims at the awakening of the dormant kundalini energy, thus allowing a sadhaka (practitioner) to access his complete human potential. In most of the classical yoga systems, the mind is willfully brought under control. In Kriya Yoga however, the practitioner is not asked to counteract the disturbances of the mind. He is given specific, subtle inner movements that systematically refine his consciousness and release energy. It can be stated that at present, there are two main streams of Kriya yoga. That of Paramahamsa Yogananda and that of Swami Satyananda. Previously Kriya Yoga was handed down from teacher to disciple by word of mouth (oral tradition) and non of the classical scriptures describes the techniques in detail, so the ordinary practitioner could understand how to apply them. Swami Satyananda opened up the science of Kriya Yoga and presented it to the broader public. Originally there are more than 76 kriyas mentioned in the scriptures, Swami Satyananda choose 20 of them. He described them in detail and systematized them in a clear structure to be learnt over a period of 3 years, to make this ancient science available for the practitioner in the present age.