If you're looking to tone up your core and strengthen your back with a home workout that targets your abs, then the Body-Solid Best Fitness Semi-Recumbent Ab Bench is an excellent choice. This bench holds you at a 45-degree angle, so that you can focus entirely on ab crunches and knee raises to better work your midsection, back and core muscles in the comfort of your own home. The upholstered seat offers proper support for your upper back with 3 different positions, and the footrest has spring-lock and lockout options.