Circuits, systems, and methods for monitoring and coaching a person's sideways spacing foot placement and roll, shoe life, and other running/walking characteristics

1. A foot monitoring system comprising:

a measurement circuit configured to measure sideways roll of a person's foot during at least a portion of forward rolling progression as the foot rolls forward from an impact location to lift-off from a running surface while the person is walking/running; and

an alert circuit that is configured to:

determine based on the sideways roll that the person should change sideways spacing in a sideways direction between forward paths of the person's feet to change further measured values of the sideways roll of the person's foot toward preferred sideways roll values of the person's foot while the person continues walking/running; and

generate a notification that indicates to the person to change the sideways spacing in the sideways direction between forward paths of the person's feet while the person continues walking/running.

2. The foot monitoring system of claim 1 , wherein the alert circuit is configured to:

determine a relative distance based on a result of a difference between a measured value of the sideways roll and a baseline threshold value and/or based on a ratio of a measured value of the sideways roll and the baseline threshold value; and

generate the notification based on the relative distance to indicate how far the person is recommended to change the sideways spacing in the sideways direction between forward paths of the person's feet while the person continues walking/running.

3. The foot monitoring system of claim 1 , wherein the alert circuit is configured to:

receive input from the person indicating that a first spacing, corresponding to one of a greatest or a least sideways spacing between forward paths of the person's feet that the user finds acceptable for walking/running, is occurring;

record a measured value of sideways roll associated with the first spacing;

receive input from the person indicating that a second spacing, corresponding to the other one of the greatest or the least sideways spacing between forward paths of the person's feet that the user finds acceptable for walking/running, is occurring;

record a measured value of sideways roll associated with the second spacing;

determine a preferred value of sideways roll for the person based on the recorded measured values of sideways roll associated with the first and the second spacings; and

generate notifications to the person to change sideways spacing in the sideways direction between forward paths of the person's feet based on comparison of the preferred value of sideways roll and measured values of sideways roll while the person continues walking/running.

4. The foot monitoring system of claim 3 , wherein the alert circuit is configured to:

generate a notification that indicates to the person to change the sideways spacing between the greatest and the least sideways spacing between forward paths of the person's feet to perform calibration which generates the preferred value.

5. The foot monitoring system of claim 1 , wherein the alert circuit is configured to:

determine at least one metric based on values of the measured sideways roll while the person walks/runs over a period of time for calibration;

determine a preferred value of sideways roll for the person's foot based on the at least one metric; and

generate notifications that indicate to the person to change sideways spacing in the sideways direction between forward paths of the person's feet, based on comparison of the preferred value of sideways roll and measured values of sideways roll while the person continues walking/running.

6. The foot monitoring system of claim 5 , wherein the alert circuit is configured to:

mathematically combine at least some of the measured values of sideways roll to generate the at least one metric; and

determine the preferred value of sideways roll for the person's foot based on a mathematical combination of the at least one metric and body geometry information defined by the person or another operator that indicates whether the person walks/runs with overpronation sideways roll of the person's foot, neutral pronation sideways roll of the person's foot, or underpronation sideways roll of the person's foot.

7. The foot monitoring system of claim 5 , wherein the alert circuit is configured to:

mathematically combine at least some of the measured values of sideways roll to generate the at least one metric; and

determine the preferred value of sideways roll for the person's foot based on a mathematical combination of the at least one metric and body geometry information defined by the person or another operator that indicates an arch height of the person's foot.

8. The foot monitoring system of claim 5 , wherein the alert circuit is configured to:

mathematically combine at least some of the measured values of sideways roll to generate the at least one metric; and

determine the preferred value of sideways roll for the person based on a mathematical combination of the at least one metric and body geometry information defined by the person or another operator that indicates a length and/or width of the person's foot.

9. The foot monitoring system of claim 5 , wherein the alert circuit is configured to:

determine a range of the values of the measured sideways roll as the person walks/runs over the period of time; and

generate the preferred value of sideways roll based on the range of the values.

10. The foot monitoring system of claim 1 , wherein:

the measurement circuit is configured to measure impact during at least a portion of forward rolling progression as the foot strikes the running surface and rolls forward from an impact location to lift-off from the running surface while the person is walking/running; and

the alert circuit is configured to:

determine a relationship between values of the measured impacts and corresponding values of the measured sideways roll that are concurrently occurring;

determine a preferred value of sideways roll for the person's foot based on the relationship; and

generate notifications to the person to change sideways spacing in the sideways direction between forward paths of the person's feet based on comparison of the preferred value of sideways roll and measured values of sideways roll while the person continues walking/running.

11. The foot monitoring system of claim 10 , wherein the relationship determined by the alert circuit indicates a trend between changes in the values of the measured impacts and corresponding measured values of the sideways roll that are concurrently occurring.

12. The foot monitoring system of claim 11 , wherein the alert circuit is configured to determine from the relationship the preferred value of sideways roll for the person to reduce values of the impacts while corresponding values of the sideways roll that are concurrently occurring satisfy a defined criteria as the person continues walking/running.

13. The foot monitoring system of claim 11 , wherein the alert circuit is configured to determine from the relationship the preferred value of sideways roll for the person to obtain preferable values of the sideways roll while corresponding values of the impact that are concurrently occurring satisfy a defined criteria as the person continues walking/running.

14. The foot monitoring system of claim 1 ,

wherein the alert circuit is further configured to generate a record of values of the measured sideways roll of the person's foot while the person is walking/running; and

further comprising a display device configured to graph the values of the measured sideways roll from the record relative to an elapsed time of the activity, a speed at which the person was walking/running, a stride step distance, and/or a distance that the person walked/ran.

15. The foot monitoring system of claim 1 , wherein the alert circuit is further configured to generate the notification by regulating a tone characteristic of an audible warning generated through a sound generation device to indicate to the person to change the sideways spacing in the sideways direction between forward paths of the person's feet while the person continues walking/running.

16. The foot monitoring system of claim 1 , wherein the alert circuit is further configured to generate the notification by displaying a visual warning through a display device to indicate to the person to change the sideways spacing in the sideways direction between forward paths of the person's feet while the person continues walking/running.

17. The foot monitoring system of claim 1 , wherein:

the measurement circuit is configured to be mounted on the person's shoe to increase sensitivity of the measurement from the foot striking the surface while the person is walking/running, and

the alert circuit comprises a wristwatch.