Abstract: An exercise device comprises a rear support which is contoured to be placed against the small of the back, a rigid front pate having a front pad forming a load or resistance to movement against the front plate and an adjustable linkage interconnecting the front plate and the rear support for adjusting the size of the exercise device and the load or resistance, so that repeated use of the exercise device results in improvement of the muscle tone of a person using the device, thereby improving the condition of the muscles in the abdominal region of the user.