Abdominal Crunch Coaster provides a workout solution for strengthening your midsection of your body with a exercise bike for an intense cardio workout. It is designed as a bottom up workout function which is different from other abs crunch machine. It can be used to work out the shoulders, back, arms, and legs at the same time providing a more efficient way of working out . It also offers a contoured padded cushion for supporting arms and legs during workout. This machine is so versatile and can be used for a complete fitness routine or as an abdominal trainer.