Abdominal Exercise Device

摘要

The disclosed invention is an exercise device being capable of providing aerobic exercise and abdominal muscle conditioning. The device is comprised of an upper frame and a lower frame. The upper frame includes a seat back which supports the upper portion of the torso of a user. The lower frame includes a pelvis support and a bicycle pedaling mechanism. The preferred embodiment includes a linkage system that connects the upper frame to the lower frame. This linkage is capable of providing a translating center of rotation when the upper frame rotates with respect to the lower frame. This is done to follow the body's translating center of rotation during trunk flexion. An alternative to the preferred embodiment includes a arcuate roller attached to the upper frame. This arcuate roller is preferably received by a track on the lower frame, and though preferable, the track is not necessary in order to achieve a translating center of rotation and therefore not necessary to the function of the invention. The upper frame and the lower frame are pivotally mounted one to another thus allowing the device to fold onto itself for easy storage.