The most important activity is to learn how to breathe. We commonly breathe with our shoulders, raising our upper chest. This manner of breathing uses our neck and throat muscles and comes at a cost. It requires more energy to breathe, burning more fuel to raise your chest. Tension is increased in the neck and back.
We all breathe with our diaphragm. Using your diaphragm more efficiently, and relaxing your abdomen and back, uses less energy and reduces overall tension.
Breathing efficiently is a habit we link with managing our feelings of anxiety, worry or distress.