😌 The benefits of Square Breathing Lowers stress The biggest benefit of box breathing is relaxation, especially in times of stress. Studies show that regulating your breath can lower levels of the stress hormone cortisol and maybe even help lower blood pressure. Activates the parasympathetic nervous system In times of stress, your sympathetic nervous system is on high alert. Box breathing can help you move out of that state by tapping into the bodily system responsible for rest and digestion —