Breakthrough Belly Flattening Plan.7)Extend 'n' Curl.

Kneel with hands directly beneath shoulders and knees directly beneath hips. Keep back straight and head in line with spine. Simultaneously raise left arm and right leg, extending them in line with back so fingers are pointing straight ahead and toes are pointing back. Then contract abs and draw left elbow and right knee together beneath torso. Extend and repeat. Perform 10 reps, switch arms and legs, and repeat.