XtremepowerUs Abdominal Crunch Coaster provides a new workout solution for strengthen your midsection of the body. This coaster crunch ab machine is designed as a bottom up workout which is different from the other ab crunch machines. Benefits from the XtremepowerUs crunch ab machines is that is it designed to work out the shoulders, back, arms, and legs at the same time providing a more efficient way of working out. Out exercise machine offers a contoured padded cushion for supporting the arms and legs during a workout session. Just this machine alone can be used for a complete fitness routine or it can be used as a abdominal trainer only.