The present invention is directed to a device for abdominal exercise in a seated position using a seat. The device comprises a first elastic band, a second elastic band, a pair of couplings, and a harness. The elastic bands are of a configured length and resistance and have a first end extending to a distal second end. The coupling is secured at the first end of the elastic bands and operable to secure the device to the seat. The harness has a first and second end and presents a partial perimeter. The second end of the first elastic band is joined to the first end of the harness, the second end of the second elastic band is joined to the second end of the harness, whereby the continuously joined first elastic band, harness, and second elastic band present a partial perimeter for user engagement.