9 Minute Core Workout for a Flatter Belly and a Smaller Waist

1. Vacuum

Lie on your back, knees bent, arms relaxed. Do this on an empty stomach. Inhale fully, then exhale through the mouth while drawing your abdomen inward toward the spine and emptying your lungs. Gravity assists. Hold 15 seconds then release. Gradually build to a one minute hold. Repeat 3 to 5 times. Keep each series at least 2 minutes. Use caution if you have digestive or health issues. It raises internal pressure and is unsafe for heart conditions, herniated discs, or asthma.

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