Basic CrunchLie on your back with your knees bent and feet flat. Place your hands by your ears. Curl your shoulders forward, contract your abs for a second or two and then lower your shoulders back to the starting position
Tips
Crunches: Knees UpLie on your back with your knees bent and feet flat. Place your hands by your ears. Curl your shoulders forward, contract your abs for a second or two and then lower your shoulders back to the starting position.
Tips
Reverse CrunchesLie on your back and raise your legs so your thighs are perpendicular to your body. Place your calves and feet parallel to the floor. Have your hands lightly placed at the sides of the head or by your side. Use your lower abs to raise your hips off the floor, bringing your knees toward your forehead. Lower your hips in a controlled motion, keeping tension on your abs.
Tips
Knee RaisesLie on your back, hand under your buttocks (palm down), elbows out so that the small of your back is pressed against the floor. Keep your head up (chin to chest) and shoulder blades off the floor. Then extend your legs straight out (knees unlocked) and your heels on the floor. Use your lower ab muscles to draw your knees up to your chest. Then lower in a controlled motion, keeping a slight bend in the knees.
Tips
And i found this video... - http://www.youtube.com/watch?v=3fU_8kJeXeE
Tyler