A system (100) for preventing pressure ulcers, where the system (100) includes one or more bearings assemblies (110) each including a multiplicity of movable bearings (20) and one or more actuators (60) for moving said bearings (20). The bearings (20) can be rotated to allow shifting locations of the bearings (20) in respect to a part of the patients body laid thereover for changing pressured touch points between the part of the patients body and the bearings (20) over time for preventing development of pressure ulcers. This is done by moving the patients body caused by the rotation of the bearings (20).
