A system for supporting a body of a user, the system comprising: a plurality of cells adjacent to the body of the user, each of the cells within the plurality of cells comprising or operatively associated with: a bladder having a top surface for supporting the body of the user; a base adjacent and forming a fluid-tight seal with a bottom portion of the bladder for supporting and maintaining a fluid pressure within the bladder, wherein the bladder forms a rolling diaphragm portion with the base, the rolling diaphragm configured to roll along the support element when a force is applied to the bladder by the body of the patient; and a compressible fluid within the bladder, when in use, inflating the bladder such that the top surface is at a height above the base, the compressible fluid preferably being air, and the base comprising functionally associated therewith: at least one valve in fluidic communication with the bladder, the valve configured to control inflow and/or outflow of the compressible fluid; a pressure sensor adapted and arranged to measure a pressure of the compressible fluid; and a height sensor configured to measure the height of the top surface of the bladder above the base over a majority of its range of motion; wherein a body support surface topology of the plurality of cells is defined, collectively, by the height of the top surface of each of the cells of the plurality, and wherein a controller in electronic communication and operatively associated with each of the cells within the plurality of the cells, the controller comprising a processor configured and programmed to measure, record, display, and/or control the body support surface topology. a plurality of cells adjacent to the body of the user, each of the cells within the plurality of cells comprising or operatively associated with: a bladder having a top surface for supporting the body of the user; a base adjacent and forming a fluid-tight seal with a bottom portion of the bladder for supporting and maintaining a fluid pressure within the bladder, wherein the bladder forms a rolling diaphragm portion with the base, the rolling diaphragm configured to roll along the support element when a force is applied to the bladder by the body of the patient; and a compressible fluid within the bladder, when in use, inflating the bladder such that the top surface is at a height above the base, the compressible fluid preferably being air, and the base comprising functionally associated therewith: at least one valve in fluidic communication with the bladder, the valve configured to control inflow and/or outflow of the compressible fluid; a pressure sensor adapted and arranged to measure a pressure of the compressible fluid; and a height sensor configured to measure the height of the top surface of the bladder above the base over a majority of its range of motion; a bladder having a top surface for supporting the body of the user; a base adjacent and forming a fluid-tight seal with a bottom portion of the bladder for supporting and maintaining a fluid pressure within the bladder, wherein the bladder forms a rolling diaphragm portion with the base, the rolling diaphragm configured to roll along the support element when a force is applied to the bladder by the body of the patient; and a compressible fluid within the bladder, when in use, inflating the bladder such that the top surface is at a height above the base, the compressible fluid preferably being air, and the base comprising functionally associated therewith: at least one valve in fluidic communication with the bladder, the valve configured to control inflow and/or outflow of the compressible fluid; a pressure sensor adapted and arranged to measure a pressure of the compressible fluid; and a height sensor configured to measure the height of the top surface of the bladder above the base over a majority of its range of motion; at least one valve in fluidic communication with the bladder, the valve configured to control inflow and/or outflow of the compressible fluid; a pressure sensor adapted and arranged to measure a pressure of the compressible fluid; and a height sensor configured to measure the height of the top surface of the bladder above the base over a majority of its range of motion; wherein a body support surface topology of the plurality of cells is defined, collectively, by the height of the top surface of each of the cells of the plurality, and wherein a controller in electronic communication and operatively associated with each of the cells within the plurality of the cells, the controller comprising a processor configured and programmed to measure, record, display, and/or control the body support surface topology.