Jump Force app for iPhone and iPad

procedure of measurement and analysis is as follows:

(1) Begin the application
(2) Push Goto measurement button so as to move the measurement screen
(3) Push Start button so as to start the measurement
(4) Prepare the repeated jump with holding your hands on the pelvis within 2 second after push the Start button
(5) Begin the repeated jump immediately after a beep sound. The default number of jumps is set at 10 times
(6) Push Stop button after finishing repeated jumps so as to move analysis screen
(7) Push Execution button when starting the analysis so as to obtain the analysed result. The peak value and average value of peak forces were displayed as the jumping performance