Hi friend's, take a look at the attached video on simple effective ways to do vagal toning. Understand that this is transitioning the sympathetic nervous system into a parasympathetic state. You may feel residual effects as you do vagal toning if your nervous system is stuck in a state of anxiety, anxiousness or fight or flight.
You should feel no pain when trying these moves, try one today and grt comfortable with the transition, however you may feel waves of the body relaxing, crying, warmth, trembles. Keep yourself grounded and drink water.