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1. Vacuum
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Lie on your back with knees bent and arms by your sides. It is best to do this on an empty stomach. Breathe in deeply and exhale through your mouth, pulling your abs toward your spine as you let out all the air. Gravity helps you here. Hold for 15 seconds, then relax. If comfortable, increase to one minute. Repeat 3 to 5 times. Each session should last at least 2 minutes. If you have stomach or health issues, use caution. This move increases pressure in your belly, so avoid if you have heart problems, herniated discs, or asthma.
