Abstract: The exercise device includes a base; an elongated prop extending upward from the base and having an upper and a lower longitudinal slide groove; a first left and a first right slide piece movably disposed on opposite sides of the elongated prop in the upper slide groove, each of the first left and right slide pieces having a handle piece; a second left and a second right slide piece movably disposed on opposite sides of the elongated prop at the lower slide groove, each of the second left and right slide pieces having a foot support piece; a left vertical adjoining plate connecting the first and second left slide pieces; a right vertical adjoining plate connecting the first and second right slide pieces; a pulley and a cable passing over the pulley and having two ends, each of the left and right vertical adjoining plates having a top end attached to one end of the cable; and a pair of hydraulic cylinders, each having a piston rod coupled to one of the second left and right slide pieces, the hydraulic cylinder