The MannFit System is based on an important new breakthrough in basic physics, kinematics, and kinesiology by S. Mann, in which use is made of the time-integrals of distance. All other previous work in kinematics and kinesiology is based on distance and its time-derivatives only. Mann's discovery of integral kinematics came about as a result of inventing the world's first underwater musical instrument which works on integrated distance. Others in the scientific community are building on Mann's concept of integral kinematics, for which he coined the term "absement". See for example, Memory Elements: A Paradigm Shift in Lagrangian Modeling of Electrical Circuits