These tackle your "inner unit," the deep muscles that act like Spanx to hold your whole midsection firm and tight. Strengthen them and you'll automatically sit and stand with your belly pulled in and looking flatter. Do two sets of each, three days a week.More
Step 1: Start on hands and knees, hips directly over knees and shoulders directly over wrists. Pull your navel toward your spine and round your midback toward the sky. At the same time, drop your head and draw your chest toward your tailbone. (This is Cat.) Pause for 10 seconds.
Step 2: Lift your head, sternum, and tailbone toward the sky. (This is Cow.) Pause for 10 seconds. Return to Cat. Repeat until you have done each pose 3 times.
Step 1: Lie on your back with your knees bent, feet planted firmly on the floor.
Step 2: Squeeze your glutes and raise your hips so your body forms a straight line from your knees to your shoulders. Don't raise your hips so high that you're resting your weight on your neck. Instead, keep your shoulders on the floor as pictured. Lower your hips back down to the floor. Repeat 12 times.