Split and Tuck Lie faceup, with legs in a split and lifted about 6 inches off floor and hands placed lightly on back of head. Crunch up slightly (A). Bring legs together, then tuck knees into chest and crunch up more (B). Extend legs straight out and return to A. Repeat 30 times. To really work your abs, try not to let your legs touch the floor.
For a sculpted stomach, you'll need to work out every single muscle in your core. Celebrity trainer Tracy Anderson shows you how to do four powerful variations on the plank, designed to tighten and tone your middle. Do these moves six times a week, paired with 30 minutes of cardio, for major results. | Health.com