Stress

• When you encounter a stressful situation, you begin to take shorter and more shallow breaths. This is what triggers a stress response in your mind. Taking deep breaths can reverse this process.
  
  

Anxiety

• Anxiety is often caused by frequent shallow breathing. Breathing deeply can calm you down and prevent panic attacks.
  
  

Oxygen Flow

• Deep breathing promotes better oxygen flow to the brain, as well as balancing the intake of oxygen and the output of carbon dioxide.
  
  

Headaches

• Headaches may become less frequent while practicing deep breathing, especially if they were caused by tension.
  
  

Blood Pressure

• Breathing deeply can also lower blood pressure. This is an effect of the improved oxygen flow that comes with deep breathing.
  
  

Heart Rate

• While frequent heart racing can be a sign of a medical problem, sometimes it is caused by stress or tension. Diaphragmatic breathing may slow the heart rate down to a normal level.