Have you noticed your breath changing when you are distressed or relaxed? The next time you are relaxed, take a moment to notice how your body feels. Or think about how you breathe when you first wake up in the morning or just before you fall asleep. Breathing exercises help you relax and change how your body feels.
Studies have shown repeatedly deep breathing is one of the best techniques and practices to lower the stress of the body. What happens when you breathe deeply is that your brain is sent a message to calm down and relax, which the brain sends back to your body letting it relax. Relaxing your body reduces your increased heart rate, fast breathing and also reduces your blood pressure, which spikes when you are distressed. Find what the University of Michigan Health has to say about this.