Starting Position: Lie on the floor with the knees bent, and feet flat on the floor. Place the hands behind the head or extended along each side of the body.
Performing the exercise: Using the abdominal muscles raise the upper body toward the knees. Continue upward until the upper body touches the thighs, then slowly lower back to the starting position, and repeat.
Tips: If keeping the feet on the floor is difficult, a partner may hold the feet. When placing the hands behind the head it is important not to pull on the neck.