Starting Position: Lie on the floor in a supine position with legs straight. Place hands under the hips for cushion and support.
Performing Exercise: Slowly raise the legs, keeping them straight, until they are perpendicular to the floor and then slowly lower them until they are 6 inches from the floor. Repeat.
Tips: If raising the legs to a perpendicular position is difficult, bringing them to a 45 degree angle is enough. Another variations that isolates the lower abdominals involves rolling the knees up toward the chest until the hips rise of the floor, instead of keeping the legs straight.