This style of breath, also called a “Square Breath,” “4x4 Breath,” or “Equal Breathing,” can be used in moments of stress or anxiety, or simply when you’d like to calm down or relax. You may have heard of Box Breathing due to its use as a part of Navy SEAL training—it’s used by soldiers to reduce stress and improve focus during chaotic moments of combat. Research supports this technique to help regulate your autonomic nervous system and it is correlated with improved sleep quality, decreased blood pressure and heart rate, and decreased symptoms of depression.