The Stamina Ab/Hyper Bench is great for working your abs and strengthening your back. Work your upper and middle abs in any of 4 crunch positions ranging from flat to a 30-degree decline, or target your lower back muscles with standing hyper-extension exercises. The bench design offers an adjustable thigh support to fit your leg length and workout intensity, and pivoting foam rollers to hold your ankles in place.

The Best Fitness Total Core Trainer combines the two most popular core workouts, an ab crunch and a back hyperextension, into one easy-to-use machine. The back hyperextension works comfortably from a standing position, providing a low-impact back workout, while the ab crunches will help you build abdominal muscles that are crucial to maintaining lumbar spine strength.