An ergonomic, power-assisted lifting-lowering unit for lifting or lowering a user, such as a disabled person. The lifting-lowering unit includes a body-holder, adapted to firmly hold/support at least at one body member/section of the torso of the user a lifting-lowering-mechanism a motion and force transmitting mechanism and a power activator. The lifting-lowering-mechanism includes a power actuator that is operatively engaged with the body-holder, at preconfigured locations. The power activator activates the power actuator to thereby set in motion the motion transmitting mechanism that causes the body-holder to move in a path closely approximating to the movement of the femur bones, or a in path parallel thereto, when the user is moving between a standing position and a sitting position, the knees being the proximal center of the pivotal motion of the femur bones of the user.
