This is why you need to learn to meditate to create an optimal nervous system.
The autonomic nervous system controls and regulates how our body works. There are two parts to the autonomic nervous system. Firstly, there is the sympathetic or fight or flight response, secondly, there is the parasympathetic or rest, repair, heal and grow response. Obviously the parasympathetic response is what you want to predominate. How do influence this, you meditate!