METHOD AND SYSTEM FOR FEEDBACK ON RUNNING STYLE FIELD AND BACKGROUND OF THE INVENTION
First Claim
1. System for generating feedback on a subject'"'"'s running style, the system comprisinga 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 forreading 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).
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Accused Products
Abstract
The invention relates to a system and method for providing feedback to a user on his or her running style or running technique. The system employs a pressure sensitive surface to record a gait line of the center of pressure exerted by the user'"'"'s foot on an underlying surface during a footstep period. In case of a fore or mid-foot landing the gait line may be observed to move backwards with respect to the sagittal plane. From a backwards-going gait line two time stamps are determined. The first timestamp T1 is the time that the foot strikes the ground. The second timestamp T2 is the time that the gait line reaches the most backward position. From the time difference between these two timestamps a loading time dT is determined. The reactivity of the running style describes the viscoelastic behavior of the muscle-tendon unit and may be calculated as a function of this loading time and/or the distance moved by the centre of pressure backwards towards the heel. Correspondingly, a feedback signal may be provided to the user about his running reactivity.
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Citations
15 Claims
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1. 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). - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. Method for generating feedback on a subject'"'"'s running style, the method comprising the steps of:
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receiving data (D) comprising a time-dependent (T) measurement of a moving center of pressure (C) exerted by the subject'"'"'s foot on a 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; 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); and 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 (Sf) as a function of the loading time (dT). - View Dependent Claims (11, 12, 13, 14)
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15. Human interface device (550) wearable on a subject'"'"'s wrist or arm for providing a user with feedback (SO on a running style, the device (550) comprising
a wireless transceiver (503) arranged for receiving a signal (Sw) indicative of the subject'"'"'s running reactivity (R), the running reactivity defined as a parameter (R) inversely proportional to a measured time period (dT) between a first moment (T1) that a foot of the subject hits the ground and a second moment (T) that a center of pressure (C), exerted by the subject'"'"'s foot reaches a most backward position (202) with respect to the subject'"'"'s running direction (F); -
a display (504) arranged for displaying an image as a function of the received signal (Sw) of the subject'"'"'s running reactivity (R); attachment means (512) arranged for attaching the display (504) to the subject'"'"'s wrist or arm
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Specification