Body condition estimation system and shoe

1 . A body state estimation system, comprising:

a detector configured to detect an inclination around a predetermined axis of a shoe; and

an estimation unit configured to estimate an inclination state of a wearer of the shoe, based on a detection result from the detector,

wherein the inclination state is a heel valgus angle of the wearer of the shoe.

2 . The body state estimation system according to claim 1 , further comprising a judgment unit configured to judge a gait of a wearer based on an estimation result from the estimation unit.

3 . The body state estimation system according to claim 2 , wherein, based on a regression model set in advance to estimate the heel valgus angle, the estimation unit is configured to estimate the heel valgus angle of the wearer.

4 . The body state estimation system according to claim 3 , wherein the regression model is a model configured to estimate a peak value of the heel valgus angle.

5 . The body state estimation system according to claim 1 , wherein, based on a regression model set in advance and configured to estimate the heel valgus angle, the estimation unit is configured to estimate the heel valgus angle of the wearer.

6 . The body state estimation system according to claim 5 , wherein the regression model is a model configured to estimate a peak value of the heel valgus angle.

7 . A shoe, comprising:

the body state estimation system according to claim 1 ;

and

an output unit configured to output a detection result from the detector to the estimation unit.

8 . A body state estimation system, comprising:

a detector configured to detect an inclination around a predetermined axis of a shoe; and

an estimation unit configured to estimate a heel valgus angle of a wearer of the shoe, based on the inclination around the predetermined axis of the shoe,

wherein the heel valgus angle is an angle between a lower leg inclination angle of the wearer of the shoe and a calcaneal valgus angle of the wearer of the shoe, the lower leg inclination angle being an angle made by a lower leg on a medial side with respect to a Y-axis of the shoe extending from the medial side towards a lateral side when viewed from a back of the shoe and the calcaneal valgus angle being an angle made by a calcaneus on the medial side with respect to the Y-axis.

9 . The body state estimation system according to claim 8 , further comprising a judgment unit configured to judge a gait of a wearer based on the heel valgus angle.

10 . The body state estimation system according to claim 9 , wherein the estimation unit is configured to estimate the heel valgus angle using a regression model configured to estimate the heel valgus angle based on an angle of the inclination around the Y-axis of the shoe and an angle of the inclination around an X-axis of the shoe extending from a heel side towards a toe side in a horizontal plane that is the same horizontal plane for the Y-axis.

11 . The body state estimation system according to claim 10 , wherein the regression model is configured to estimate a peak value of the heel valgus angle, and

the estimation unit is configured to estimate the heel valgus angle based on the peak value of the heel valgus angle.

12 . The body state estimation system according to claim 8 , wherein the estimation unit is configured to estimate the heel valgus angle using a regression model configured to estimate the heel valgus angle based on an angle of the inclination around the Y-axis of the shoe and an angle of the inclination around an X-axis of the shoe extending from a heel side towards a toe side in a horizontal plane that is the same horizontal plane for the Y-axis.

13 . The body state estimation system according to claim 12 , wherein the regression model is configured to estimate a peak value of the heel valgus angle, and

the estimation unit is configured to estimate the heel valgus angle based on the peak value of the heel valgus angle.

14 . A shoe, comprising:

the body state estimation system according to claim 8 ; and

an output unit configured to output the heel valgus angle to an external terminal configured to display the heel valgus angle.

15 . A body state estimation system, comprising:

a detector configured to detect an inclination around a predetermined axis of a shoe; and

an estimation unit configured to estimate an inclination state of a wearer of the shoe, based on a detection result from the detector,

wherein the inclination state is a heel valgus angle of the wearer of the shoe,

based on a regression model set in advance and configured to estimate the heel valgus angle, the estimation unit is configured to estimate the heel valgus angle of the wearer, and

the regression model is a model that uses, as explanatory variables, an angle around an axis extending from a heel side toward a toe side of the shoe and an angle around an axis extending from an medial side toward an lateral side of the shoe, each at a plurality of time points during a stance phase, and uses, as an objective variable, a peak value of the heel valgus angle.

16 . A shoe, comprising:

the body state estimation system according to claim 15 ; and

an output unit configured to output the heel valgus angle to an external terminal configured to display the heel valgus angle.

17 . The body state estimation system according to claim 15 , wherein the heel valgus angle is an angle between a lower leg inclination angle of the wearer of the shoe and a calcaneal valgus angle of the wearer of the shoe, the lower leg inclination angle being an angle made by a lower leg on a medial side with respect to a Y-axis of the shoe extending from the medial side towards a lateral side when viewed from a back of the shoe and the calcaneal valgus angle being an angle made by a calcaneus on the medial side with respect to the Y-axis.

18 . A shoe, comprising:

the body state estimation system according to claim 17 ; and

an output unit configured to output the heel valgus angle to an external terminal configured to display the heel valgus angle.