An insole for insertion into an article of footwear, said insole being substantially planar and extending in an horizontal plane (X, Y) perpendicular to a thickness direction, the insole comprising a measurement portion extending in the horizontal plane (X, Y), the measurement portion comprising at least: - a flexible upper sheet and a flexible lower sheet facing one another in the thickness direction; - a flexible insulating dielectric sheet arranged between the upper sheet and the lower sheet; - a plurality of capacitive force sensors in the measurement portion of the insole, each capacitive force sensor comprising at least an upper electrode on the upper sheet and a lower electrode on the lower sheet, the lower electrode facing the upper electrode in the thickness direction and being separated from the lower electrode at least by the flexible insulating dielectric sheet; - a network of upper conductive leads on the upper sheet, electrically connected to the upper electrodes of the plurality of capacitive force sensors, and a network of lower conductive leads on the lower sheet, electrically connected to the lower electrodes of the plurality of capacitive force sensors; the insole further comprising a chip portion extending in the horizontal plane (X, Y), the chip portion comprising at least: - a chip support member being substantially planar and extending in the horizontal plane (X, Y) of the insole between an upper face and a lower face, said chip support member being separated from the dielectric sheet, and - control and transmit electronics, mounted in the chip portion of the insole, and comprising at least a control electronic electrically connected to the plurality of capacitive force sensors and a wireless transceiver able to communicate with a remote server, the upper sheet comprising an upper contacting tab extending from the measuring portion of the insole into the chip portion of the insole and being in surface contact with at least a portion of the chip support member, said upper contacting tab comprising at least one conductive lead connected to at least one upper electrode of a capacitive force sensor via the network of upper conductive leads, and the lower sheet comprising a lower contacting tab extending from the measuring portion of the insole into the chip portion of the insole and being in surface contact with at least a portion of the chip support member, said lower contacting tab comprising at least one conductive lead connected to at least one lower electrode of a capacitive force sensor via the network of lower conductive leads. - a flexible upper sheet and a flexible lower sheet facing one another in the thickness direction; - a flexible insulating dielectric sheet arranged between the upper sheet and the lower sheet; - a plurality of capacitive force sensors in the measurement portion of the insole, each capacitive force sensor comprising at least an upper electrode on the upper sheet and a lower electrode on the lower sheet, the lower electrode facing the upper electrode in the thickness direction and being separated from the lower electrode at least by the flexible insulating dielectric sheet; - a network of upper conductive leads on the upper sheet, electrically connected to the upper electrodes of the plurality of capacitive force sensors, and a network of lower conductive leads on the lower sheet, electrically connected to the lower electrodes of the plurality of capacitive force sensors; - a chip support member being substantially planar and extending in the horizontal plane (X, Y) of the insole between an upper face and a lower face, said chip support member being separated from the dielectric sheet, and - control and transmit electronics, mounted in the chip portion of the insole, and comprising at least a control electronic electrically connected to the plurality of capacitive force sensors and a wireless transceiver able to communicate with a remote server,