Diaphragmatic breathing (also known as deep breathing) allows air to enter your lungs. This will expand your stomach and allows enough oxygen to enter your body helping manage stress. You can practice deep belly breathing by placing one hand on your chest and one hand on your stomach. Notice how you breathe normally. The hand on the chest should not move and your shoulders should not be moving up and down. This would be shallow breathing and tends to make stress worse. The hand on your belly should be moving out and in. Imagining the belly is a balloon that is filling up with air when you inhale and deflating when you exhale. Practice this a few minutes every day so that it can be easier to turn to when you are feeling overwhelmed and also easier to spot when your breathing is becoming shallow so you can readjust it!