The prototype of the ab wheel was born in the United States in the 1930s, with a basic structure of a roller and a handle. In the 1960s, the commercial product “Reduce a Wheel” was launched, marking the beginning of the modern ab wheel. In the 1980s and 1990s, the improved version “Ab Roller” swept the world, making it a popular equipment for abdominal muscle training. Nowadays, it has developed into various styles such as silent, foldable, and smart counting, becoming a standard tool for home fitness.