Abstract: A sit-up exercise bench comprising a horizontal platform connected to a slant-adjustable back rest, a harness adapted to be engaged by an exerciser's shoulder, said harness operably connected to a restraining spring attached to said horizontal frame whereby an exerciser, reclining upon the bench, may perform sit-up exercises from the waist, sitting up against the resistance provided by the tension springs. In an alternate embodiment, a pivotable arcuate-shaped bar attached to tension springs for engagement by the exerciser's legs provide restraining force to movement of the exerciser's legs in two positions.