Watch free exercise videos with ab exercises from the Get a Flat Belly in 6 Weeks ab workout plan at FitnessMagazine.com.
Crisscross. Lie down with your knees bent and your feet lifted so your shins are parallel to the floor. Place your hands behind your head. Now, extend your left leg out about 45 degrees to the floor and bring the right knee in towards your chest. Push your left shoulder towards your right knee.