An ab crunch board is a curved support platform designed for crunches and sit-ups. The curve increases the range of motion and allows a deeper stretch at the bottom, leading to stronger abdominal contractions. The padded surface and handles provide comfort and grip during high-rep abdominal work. It is a simple, cost-effective addition to any home core-training setup. The board can also be used for reverse crunches and oblique exercises. It helps isolate the abdominal muscles while reducing strain on the lower back compared to performing crunches on a flat floor.