Let's move to the muscles of the chest, shoulders and upper back. We'll be tightening and relaxing several muscles here at the same time. And, you'll have to hold your breath to do so. Ready? Take a deep breath. Hold it…. Now pull the shoulder blades together by pulling your shoulders back, and at the same time trying to get your shoulder blades to touch. Do feel the tension in your chest, shoulders and upper back? Hold the tension, then relax. Do you feel the tension rushing out of those muscles? Do you feel the muscles suddenly becoming more relaxed? Good.
Now we'll do the abdominal muscles. Tighten your stomach muscles as if you were preparing to receive a blow to the stomach. The stomach muscles should be very tight. Do you feel the tension in your stomach? Hold the tension. Then relax. Can you feel tension leaving your abdominal muscles? Can you feel your stomach muscles suddenly relaxing? Great.