With breathing and relaxing then you can get out of the stress in your life. You can use the breath to relax, rather than stress, your mind and body. Yoga helps you to relearn that natural state of body and mind want to be in: relaxation.
In a good breathing will calm and energy. The energy you feel from a few minutes to breathe the liver was not nervous or hyper, but that energy, steady calm that we all need. Breathing slow, steady, and give a message to calm the nervous system: Be calm.
Entire books have been written on yoga breathing. Here is one of the 5-minute Breath Break. (Read the instructions several times before you try to practice.)
A. Sit with your spine as straight as possible. Use a chair if necessary but do not degenerate into it. Flat on the floor with your knees directly above the center of the foot. Use a book or pillow under your feet if they do not rest comfortably on the floor. Hands are at the top of your foot.
2. Close your eyes gently and let them rest behind closed lids.
3. Think about your ribs, on the front, rear, and on the side of your body. Your lungs are behind those ribs.
4. Feel your lungs fill up, your ribs expanding out and up. Feel the lungs emptying, your ribs coming back down and in. Do not push the breath.
5. Some times you do this, do it for 2 to 3 minutes, then do so up to 5 to 10 minutes. At first, set aside time at least once a day to do this. When you learn how good it makes you feel, you'll want to do it at other times as well.
Just as one stressful situation into the next challenge, relaxing for a few minutes every day gradually brought into the rest of your daily life and activities.