The development of the product began in the late 70's at the University of Jyväskylä. Eminent scients have been involved in its development including, Pekka Luhtanen, Keijo Häkkinen and others. Our system includes a contact mat, photo cells and a reaction time device. Speed, explosive strength, mechanical jumping power, force -velocity curve, reaction time, etc. are all measured very quickly, easily and reliably using our measuring system. The POWERTIMER is a modular system with the aim of measuring force velocity characteristics in almost every sport in both laboratory and field conditions. Including a bibliography of scientific papers on: vertical jump mechanical power force velocity.