Method and system for feedback on running style field and background of the invention

System for generating feedback on a subject's running style, the system comprising

• a pressure sensitive surface (A) with a plurality of pressure sensors for generating an electronic signal (Sp) as a function of a pressure (P) exerted on said pressure sensitive surface (A);
• a clock (502) arranged for providing timestamp information;
• a memory (503) arranged for storage and retrieval of data;
• a readout device (501) arranged for reading out the plurality of pressure sensors and the clock and storing data in the memory comprising a time-dependent (T) measurement of a moving center of pressure (C) exerted by a subject's foot on the pressure sensitive surface (A), the moving center of pressure (C) forming a pressure gait line (211,212) at least distinguished along a forward axis (Xf) of a running direction;
• a feedback device (505) arranged for generating one or more of a visual, audio, or haptic feedback signal (Sf) and controlled by a processor (504), said processor (504) arranged for
• reading the data from the memory (503);
• determining from the data a first timestamp (T1) at a first registered moment that the subject's foot starts touching the ground;
• determining from the data a second timestamp (T2) at a moment that the center of pressure (C) reaches the most backwards registered position along the gait line with respect to the forward axis (Xf);
• calculating a time difference between the first (T1) and second timestamps (T2) as a defined loading time (dT);
• and
• controlling the feedback device (605) to generate a feedback signal (SD as a function of the loading time (dT).