Get Flash to see this player.
Seated Crunch-TwistMain Muscle: AbdominalsOther Muscles: NoneMechanics: CompoundSit on a flat bench so that you can balance yourself without holding. Lean back slightly and raise your legs off the floor. With your legs bent, straighten your arms to one side and rotate from side to side. Keep your arms straight and try to touch your hands to the bench. Don’t forget to breathe during the exercise. For added resistance, hold a weighted plate or barbell while rotating from side to side.