9 mechanical apparatus for measuring athletic performance, namely, apparatus for measuring force, strength, length, rate, velocity, and acceleration of horizontal and vertical leg movements, and structural and carrying parts therefor; electronic devices for measuring athletic performance, namely, devices for measuring, collecting, and analyzing metrics of force, strength, length, rate, velocity, and acceleration of horizontal and vertical leg movements, and electronic charging parts therefor; computer hardware devices for sensing and measuring athletic performance, namely, devices with a computer microprocessor for sensing, measuring, analyzing horizontal and vertical leg movements