Abstract: An abdominal exercise device includes a support structure, a track movable relative to the support structure, a body support member movable relative to the support structure and track, and an adjustable base secured to the support structure. A locking mechanism attaches to the track, and selectively secures the track at a fixed orientation relative to the support structure. In a first state, the locking mechanism restricts the track from rotating relative to the support structure. In a second state, the locking mechanism allows the track to rotate relative to the support structure. In using the exercise device, the user may obtain any of three motions. A first motion is provided by sliding the body support member along the track. A second motion is provided by rotating the track relative to the support structure. A third motion is a combined motion in which the body support slides along the track and the track rotates relative to the support structure.