How to Get Flat Abs Fast

Credit: Chris Fanning

Reach-for-the-sky crunch

A. (top left) Lie with your shoulder blades, back, and hips on a stability ball, knees shoulder-width apart and bent to 90 degrees, feet on the floor. Extend your arms overhead.

B. ]inset, lower right) Draw lower abdomen in toward your spine. Slowly raise your arms above your shoulders while lifting your chest so that both shoulder blades and your upper back come off the ball. Hold for 3 seconds, then return to starting position; that's 1 rep. Do 15 reps.

Trainer tip: Envision a point directly above your shoulders; reach for that same point with every rep.

Next: Stir-the-pot-plank