An exercise device comprising: a support surface for supporting the body of a user; said support surface includes a seat with a backrest; a frame for supporting said support surface above a floor; wherein said frame includes a main frame engagable with the floor, a sub-frame pivotally attached to said main frame and said support surface attached to a support surface bracket frame that is attached to the said sub frame and connecting means between said main frame, sub-frame and support surface bracket frame to permit movement therebetween, a resistance device associated with the sub frame, engageable by said user and for providing resistance to movement of said user; said resistance device, engageable by said user includes a rotatable pedal structure; an orientation changing device for changing the orientation of said support surface for supporting a user relative to said floor, the orientation changing device including an actuating device for providing relative rotation of the sub frame relative to the main frame, the actuating device being secured between the sub-frame and the main frame; characterized in that the support surface is attached on an adjustable moving mechanism to provide movement of the support surface relative to the resistance device; wherein the exercise device further comprises: a further actuating device for changing the distance between the support surface and the resistance device, the further actuating device being incorporated with the subframe and the adjustable moving mechanism; wherein said orientation changing device and said further actuating device are configured such that: when the angle of inclination of the backrest changes from a vertical inclination towards a horizontal inclination, the further actuating device simultaneously moves said support surface closer in distance to said resistance device; and when the angle of inclination of the backrest changes from a horizontal inclination towards a vertical inclination said further actuating device simultaneously moves said support surface away in distance from said resistance device. a support surface for supporting the body of a user; said support surface includes a seat with a backrest; a frame for supporting said support surface above a floor; wherein said frame includes a main frame engagable with the floor, a sub-frame pivotally attached to said main frame and said support surface attached to a support surface bracket frame that is attached to the said sub frame and connecting means between said main frame, sub-frame and support surface bracket frame to permit movement therebetween, a resistance device associated with the sub frame, engageable by said user and for providing resistance to movement of said user; said resistance device, engageable by said user includes a rotatable pedal structure; an orientation changing device for changing the orientation of said support surface for supporting a user relative to said floor, the orientation changing device including an actuating device for providing relative rotation of the sub frame relative to the main frame, the actuating device being secured between the sub-frame and the main frame; characterized in that the support surface is attached on an adjustable moving mechanism to provide movement of the support surface relative to the resistance device; wherein the exercise device further comprises: a further actuating device for changing the distance between the support surface and the resistance device, the further actuating device being incorporated with the subframe and the adjustable moving mechanism; wherein said orientation changing device and said further actuating device are configured such that: when the angle of inclination of the backrest changes from a vertical inclination towards a horizontal inclination, the further actuating device simultaneously moves said support surface closer in distance to said resistance device; and when the angle of inclination of the backrest changes from a horizontal inclination towards a vertical inclination said further actuating device simultaneously moves said support surface away in distance from said resistance device. a further actuating device for changing the distance between the support surface and the resistance device, the further actuating device being incorporated with the subframe and the adjustable moving mechanism; wherein said orientation changing device and said further actuating device are configured such that: when the angle of inclination of the backrest changes from a vertical inclination towards a horizontal inclination, the further actuating device simultaneously moves said support surface closer in distance to said resistance device; and when the angle of inclination of the backrest changes from a horizontal inclination towards a vertical inclination said further actuating device simultaneously moves said support surface away in distance from said resistance device. when the angle of inclination of the backrest changes from a vertical inclination towards a horizontal inclination, the further actuating device simultaneously moves said support surface closer in distance to said resistance device; and when the angle of inclination of the backrest changes from a horizontal inclination towards a vertical inclination said further actuating device simultaneously moves said support surface away in distance from said resistance device.