Back strenghthening maching

An improved back strengthening machine 5 having a rolling cushion assembly unit 1 contoured to firmly contact all back surfaces and strengthen all dorsal muscle groups. In addition, the back strengthening machine 5 comprises: a rolling cushion assembly unit 1, weight resistance assembly unit 2, base assembly unit 3 and a handlebar assembly unit 4. While using this machine, a user will stand onto base of base assembly unit 3, hold onto hand grips adhered to handlebar assembly unit 4, and then press onto the rolling cushion adhered to rolling cushion assembly unit 1, while aligning the elevated convex cushion shape onto the spinal location. Next, the user will use knee flexion to maintain the spinning cushion adhered to rolling cushion assembly unit 1, to spin freely up and down the user's back structures.