Toe Dip: Targets: Abs Lie face up with hands on floor behind head, and knees bent 90 degrees over hips. Lift head, neck and shoulders off the floor. Draw abs in as you lower left foot toward floor, as if dipping toes into water. Switch legs, keeping head, neck and shoulders lifted. Do 10 to 15 reps, alternating sides. (To make it easier, keep head on floor and arms at sides throughout.