Product for working out the abdominal oblique muscles. The exercise is performed from a sitting position with the shoulders positioned against the support pad. It involves rotating the torso in alternate directions to the left and to the right. Resistance is provided by a weight stack which enables the workload to be adjusted to suit each type of user. Preload adjustment allows easy on/off access; Range limiter makes motion comfortable from start to finish; Lower body rotates to isolate core and hip motion; Gas-assisted vertical seat adjustment fits all types of users; Incremental 3.3 and 6.6 lb (1.5 and 3 kg) micro-loading adjustment; Cold rolled steel weight stacks with noise dampening; Stainless steel guide rods resist rust and stay smooth; Kevlar belts for quiet, smooth action and optimal tensile strength; belt contains 2200 lb (998 kg) tensile strength aircraft cables; Marine-grade double stitched upholstery.