Work your deep abdominal muscles with this twisting move.
-Hair Wash Torso Twist: Lie down on your back. Interlace your hands behind your head. Pull your left knee in and flex your right foot. Twist your body so your right elbow goes towards your bent knee. Now, twist right as you extend your left knee and bring your right knee in. Keep twisting back and forth for 20. With each twist, exhale deeply from your abs like you're wringing out a sponge. Take a short breather and do a 2nd set of the Hair Wash Torso Twist for 20 reps. This move works your deep, or transverse ab muscles as well as your obliques. After a short breather, complete the 3rd set of Hair Wash Torso Twist for a final 20 reps. With each twist, exhale deeply from your abs like you're wringing out a sponge.