A Back Twister comprises: a horizontal supporting platform 1 with attached bearing structure 6, an elliptical stepper with two footholds 3 attached to the horizontal supporting platform 1 a hand rotary member with two hand grips 7 attached to the bearing structure 6, a kinematic transmission 8 connecting the elliptical stepper and hand rotary member such that they are rotatable in synchronisation with a 1:1 gear ratio and the user having steady position may perform an elliptical motion with feet and circular motion with hands while keeping his/her torso suspended freely above the bearing structure whereby the only support for the users body are the footholds and hand grips, which provides good exercising for muscles and joints of the spinal column, The distance between the elliptical stepper and hand rotary member is adjustable, to suit different sized users.