New Detection Technique for Timing of Contact and Noncontact of Athlete’s Foot with the Ground in Sports

The effective noncontact strategy we developed analyzes motion in sports, for example, by measuring the current generated by changes in capacitance between an electrode and the athlet’s body, i.e., detecting subpicoampere-level electrostatic induction current flowing through an electrode 3 m from a subject. This occurrence model generates current based on changes in the body’s electric potential. This model effectively explains the induction current flowing through the electrode. This detects foot contact with the ground, e.g., during a baseball game, enabling us to quantitatively estimate contact timing.