Abstract: An abdominal exercise device with a stable rolling platform, a pair of handles, and four roller assemblies. In addition to conventional roller exercises, the user may place toes or feet on the stable platform and push or pull the device. The device has attachment features on the handle and platform that permit one or more adjustable elastic cords to be temporarily attached to the exercise device while the device is pushed or pulled relative to the user's body. Variable resistance cords are provided which have a plurality of stop elements to permit the user to adjust the effective resistance of the elastic cords by temporarily securing selected stop elements to the device. In one example, the stop elements have internal tapered plugs and external tapered covers over the tapered plugs; so that the stop elements may nest in tapered receptacles on the device.