The branch of the vagus nerve that runs from the brainstem to the heart's pace-maker acts like a brake. It can slow your physiology down when you've moved into states of anxiety, anger, reactivity or are unable to be still. When you strengthen your vagal brake you're helping your nervous system become more flexible, resilient and adaptable.
You can learn more about your nervous system in the Vagus Nerve Program
Or, you can get started with the Vagus Nerve Masterclass