Here is a multi-function exercise bench that lets you perform both ab and back exercises. The HOIST HF-4263 Ab/Back Hyper Bench comes with 11 adjustable positions. It requires no assembly and folds flat for storage.
The HF-4263 Hyper Bench weighs only 45lbs, so you can easily move it around. It lets you perform exercises that target and strengthen your lower back, hips, glutes, and abs.