The process of relaxing body parts one by one, by a sadhak, is called Yog Nidra.
 
Physical, mental and emotional stress, diabetes, blood pressure, angina, heart disease and weakness are rid off by the practice of Yog Nidra; control on the mind also becomes possible. Through mental stability and calmness, many psychic powers and siddhis are attained.
 
Yog Nidra provides the easiest way to reach the inner recesses of the heart and empowers the sadhak to achieve the highest glory of Sadhana. It also endows energy and peace to the mind, the brain and the nervous system.