[header] How to tone your stomach with yoga [title] Make your inhales slow and deep. [step] Breathe in through the nose, concentrating on filling your lungs with air the way you would fill a glass with water. Expand your chest and concentrate on slowly filling every available space. 
[substeps] When you inhale, the air in your lungs pushes the diaphragm down, which naturally causes your abdomen to protrude. However, too often people learn as adults to suck in their abdomen, which means you're not taking in as much air as you should.