Lie face up on slant board, with feet near floor. Stabilize body by holding on to foot pads. Lift legs up with knees slightly bent. In a controlled motion, curl lower body up by lifting hips off board. Contract abdominals fully without compromising form. While maintaining the controlled motion, return to starting position. Do not allow muscle to relax before next repetition.
Here are a few suggested alternative exercises:Ab CrunchAb Crunch ObliquesBall Crunch TraditionalDouble CrunchDumbbell Side BendsLateral Bend with Barbell