A modular instrumented floor covering assembly is used in connection with a subject walking across the assembly. The floor covering assembly comprises a plurality of sensor panels having interlocking edges. The sensor panels are adapted for interlocking the adjacent panels together along the edges. Each sensor panel has a pressure sensor matrix responsive to a weight of the subject for generating data relating to movement of the subject. The sensor panels are adapted for selective and releasable assembly in patterns. Communicating means is provided for wirelessly communicating data between the sensor panels and from the sensor panels to a computer for analysis. Power means is provided for supplying power to the sensor panels and between adjacent sensor panels.