Abstract: A high-speed, portable computer interfaced, fluid-filled, foam-padded, heavy bag with local electronic force indicator is provided along with a mechanically-driven paper chart recorder with digital output, split screen video data recording system, and printer for automatic data analysis used to measure a fighter's individual, peak, and total applied force on a target. Such target is constructed so that the fighter feels both familiar and comfortable for each hit, each session, and for such fighter's entire training career spent practicing a bag connected in the system of the present invention. Such system is accurate enough to determine at which point a fighter'punching or kicking muscle groups undergo initial fatigue and subsequent tetanus, or tightening.