Yoga Nidra works with the autonomic nervous system by calming the sympathetic nervous system and activating the parasympathetic nervous system. The autonomic nervous system is responsible for automatic, typically unconscious processes such as our heartbeat, breathing, digestion, and blood flow.
Deep relaxation practices such as yoga Nidra show demonstrated effectiveness in managing anxiety and stress by lowering the fight or flight response, a main component of the sympathetic nervous system. Lowering the fight or flight response stimulates the parasympathetic nervous system, a huge promoter of homeostasis in the body, or the maintenance of balance in digestion, immunity, and stress management. Yoga Nidra activates the pineal gland which in turn releases melatonin, a powerful antioxidant that regulates immune function, cortisol levels, blood pressure, and the quality of sleep.