Abstract: 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.

Abstract: 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.

Abstract: A device for exercising and strengthening the muscles of the spinal column and vertebrae joints and for the spine recreation, designed taking in account that our backbone bio kinematics operate better moving in the horizontal position based on “four legs”, comprises: a bearing framework with fore and rear pivot points, two hand striding units and two foot striding units pivotally mounted to corresponding fore and rear pivot points and depending downwardly therefrom; a kinematic transmission connecting the left and right pairs of the striding units with possibility to swing the hand and foot striding units in opposite direction, provides the user with a steady balance and allows to imitate a natural walking or running-type motions with the extremities based on the foot and hand supports while keeping his/her torso suspended freely above the foot and hand supports and with the spine in a substantially free horizontal position whereby the only support for the users body is the foot and hand supports; The

Abstract: A device for exercising and strengthening the muscles of the spinal column and vertebrae joints and for the spine recreation, designed taking in account that our backbone bio kinematics operate better moving in the horizontal position based on “four legs”, comprises: a bearing framework with fore and rear pivot points, two hand striding units and two foot striding units pivotally mounted to corresponding fore and rear pivot points and depending downwardly therefrom; a kinematic transmission connecting the left and right pairs of the striding units with possibility to swing the hand and foot striding units in opposite direction, provides the user with a steady balance and allows to imitate a natural walking or running-type motions with the extremities based on the foot and hand supports while keeping his/her torso suspended freely above the foot and hand supports and with the spine in a substantially free horizontal position whereby the only support for the users body is the foot and hand supports; The main an