A system is disclosed for monitoring, recording and analysis of exercise in an exercise machine of the type which uses a cable, having a proximal end and a distal end, and a device, such as a handle, that enables a user to push or pull the proximal end of the cable against a resistance that is coupled to the distal end of the cable. A sensor or “load cell” mounted on the frame structure of the machine, for producing an electronic signal representing the instantaneous tensile force in the cable, and an electronic computer or the like, coupled to receive the electronic signal, for storing values representing the tensile force in the cable as a function of time.