A measurement and testing system comprising a plurality of measurement assemblies and a data acquisition and processing device is disclosed. Each of the plurality of measurement assemblies includes a measurement surface for receiving at least one portion of a body of a subject; and at least one measurement device configured to sense one or more measured quantities and output one or more signals that are representative of the one or more measured quantities. In one embodiment, the data acquisition and processing device is configured to determine whether a load is being applied to a particular one of the plurality of measurement assemblies by a first or second body portion of the subject. In another embodiment, the data acquisition and processing device is configured to construct a first virtual measurement assembly from a first subset of measurement assemblies and a second virtual measurement assembly from a second subset of measurement assemblies.