Features: 1)Abdominal workout chair for focusing ab workout on stomach muscles  2)Sturdy floor-based position helps users experience total range of motion  3)Supports body, head, neck, and back; works out upper and lower abs  The secret to the Ab chair is thisincredible range of motion, which takes you back beyond 180 degrees. Thegreater the range of motion the longer your ab muscles are working. So you'renot working harder, you're working smarter!