Happiness, joy, anger, sadness, anxiety, fear, … emotions that we use to respond to events that feel important to us. And for all these emotions we can say that they have a bodily component to be reflected in the body, they affect the texture of the muscles and their tension.
When all the strong emotions become activated there is a strong physiological reaction. The activity of the sympathetic nervous system increases, our heart rate accelerates, our pressure increases, we breathe faster, we are overwhelmed by adrenaline, and our body-muscles are ready for activity (fight, flight). These changes actually allow a person to cope with the situation more successfully.