Kinetic analysis

Compared to kinematic motion analysis, the history of dynamic motion analysis using force platforms is shorter and less diverse. The year 1843 can be used as the initial year, when the English physicist Wheatstone applied a bridge circuit to measure electrical resistances. This procedure (Wheatstone bridge) became the basis for measuring changes in resistance that occur in strain gauges. In the 1970s, M. Carlet developed a device (air-filled pad) for measuring the force acting on the heel and forefoot.

The first "classical" force platform to measure the vertical component of the reaction sphere is the platform constructed by EJ Marey and G. Demeny at the turn of the 19th and 20th centuries. Trottoire Dynamique "for measuring the three components of the reaction force. Both platforms worked on a similar principle as the equipment created by M. Carlet. In 1930, W O. Fenn assembled the first mechanical force platform to measure the vertical component of force. The movement of the reaction force with the implication to the movement of the projection of the centre of gravity of the body into the substrate was described in 1938 by E A. Helle-brandt. In the same year, H. Elftman published a work in which he described the use of multiple platforms simultaneously.

The measurement of the magnitude of the forces on the contact of the foot with the pad when walking using a strain gauge, without distinguishing the individual phases in the foot load, was performed by D. M. Cunnigham (1950).Together with G. W. Brown, he developed a tensometric platform for measuring the basic parameters of the reaction force vector. The first piezoelectric platform from Kistler, which became the basis for later platforms, was installed in 1969. This date can be considered the beginning of a modern era of platform used for various areas of human activity. In 1971, a similar power platform with a piezoelectric amplifier was installed in San Francisco

From 1974 is meant the use of a platform using strain gauges, in which one of the outputs was the display of reaction force vectors during the support phase of walking in Butterfly pattern (se more in paper bellow)