The Crazy Abs is a home gym that works on your abs, shoulders, back, arms and more.
How it works: you simply get on the machine, place your knees on the knee pads and pull them toward your chest with your abs.
Proven effecive: The exercise form provided by Crazy Abs has been shown to be the most effective way in strengthening your abs. It helps you do leg raises without straining your upper body or putting pressure on your back.