Abstract: An information notification device includes a longitudinal-data storage unit that accumulates, for a plurality of samples, longitudinal data indicating a temporal change in foot size of one sample, a user-data storage unit that stores user data containing a gender, an age, and a past foot size of a prediction target person, a foot-size prediction unit that predicts, based on a current foot size of the prediction target person and the longitudinal data, a change in foot size of the prediction target person in a period from a current point in time to a future point in time, and a notification processing unit that displays, on a display unit, the prediction of the change in foot size of the prediction target person in the period from the current point in time to the future point in time.

Abstract: An emotion estimating device, an emotion estimating system, and an emotion estimating method capable of estimating an emotion of a subject based on information obtained from daily activities can be provided. An emotion estimating device includes an interface that receives input of walking data of a subject measured by a measurement device and emotion data obtained by quantifying the emotion of the subject, a storage that stores the walking data and the emotion data, and an computer that obtains corresponding data in which a plurality of walking parameters included in the walking data stored in the storage are associated with the emotion data. When the interface newly receives the input of the walking data, the computer estimates the emotion of the subject from the plurality of walking parameters included in the newly received walking data, and outputs information indicating the estimated emotion of the subject.

Abstract: In a gait evaluation system, qualitative measurement value acquirers acquire at least measurement values of a stride length and a cadence as qualitative parameters indicating a walking form, measured by a measurement device worn by a subject. A qualitative result determination unit determines an evaluation result regarding a walking form using, as a certain evaluation model, an evaluation formula set such that a weight is added at least to the measurement value of the stride length. The measurement value of the stride length is a ratio of an average stride length to the height of the subject measured.

Abstract: A shoe purchase recommendation device 10A includes a user information acquisition unit that acquires user information including a first foot size that is a foot size of a user, a foot-size prediction unit that predicts, based on the first foot size of the user, a second foot size that is a foot size of the user at a future point of time, a growth-end determination unit that determines, based on the second foot size, whether foot growth of the user has ended at the future point of time, a product information storage unit that stores child product information and adult product information, a product information selection unit that selects, based on a result determined by the growth-end determination unit, product information regarding shoes from one of the child product information and the adult product information, and a display processing unit that displays the product information regarding shoes selected by the product information selection unit on a display unit.

Abstract: In a physical strength evaluation system, a reference storage stores a walking heart rate reference in which a correspondence relationship of a standard value of a relative heart rate with respect to a walking speed is defined for every gender and every age, a speed acquisition unit acquires a measured value of a walking speed of a subject, a heart rate acquisition unit acquires a measured value of the relative heart rate of the subject. A standard value derivation unit derives the standard value of the relative heart rate corresponding to the measured value of the walking speed that has been acquired, based on the walking heart rate reference. A level determination unit determines an evaluation value of a physical strength level of the subject, based on a difference between the measured value of the relative heart rate and the standard value of the relative heart rate.

Abstract: Provided is a display control method for a display control device including a processor and a storage. The method includes generating first display data for a display to display user marks at intervals so as to be added one by one as a time elapses from a timing. The intervals each correspond to a user's step length of a user obtained based on measured data on running or walking of the user. The user marks each represent a position where a foot of the user lands by one step. The method further includes generating second display data for the display to display reference marks at intervals so as to be added one by one as the time elapses. The intervals each correspond to a predetermined reference step length. The reference marks each represent a position where a reference foot lands by one step.