Refers to a Mechanical Device for Treatment of plantar flexion muscles which comprises a Mechanical structure of portableFastening Systems for the Footwear of the foot and a Mechanical Drive with a rope and an Elastic element is characterized in that the Mechanical Drive has 3 Elements: CouplerBase and Hollow Drum and the Coupler and the base form a Switch type retractable mechanism and the coupling with the Drum, a retractable mechanism Angle,And a rope that is acquired and the Hollow drum is wound in the side surface of said element.The Rope passes through a Pulley located in the main bar of the Mechanical Structure subject to an Elastic element which is connected to a Main support.This Configuration allows once the foot is in contact with a surface, the dorsal flexion Movement to store Mechanical Energy in the Elastic elementThis Energy is then used to enhance the Movement of plantar flexion.Finally, with the appropriate parameters, this Mechanical Device reduces the Energy requirement of the muscles of the plantar flexion, and soFatigue in activities that require this movementSe refiere a un dispositivo mecanico asistencial para musculos de flexion plantar que comprende una estructura mecanica portable, sistemas de sujecion para el calzado del pie y un accionamiento mecanico con una cuerda y un elemento elastico caracterizado porque el accionamiento mecanico posee 3 elementos: acoplador, base y tambor hueco siendo que el acoplador y la base conforman un mecanismo tipo interruptor retractil y el acoplador con el tambor, un mecanismo angular retractil, y una cuerda que se adquiere al tambor hueco y se enrolla en la superficie lateral de dicho elemento. Dicha cuerda pasa a traves de una polea ubicada en la barra principal de la estructura mecanica hasta sujeta un elemento elastico que a su vez esta unido a un soporte principal. Esta configuracion permite que una vez que la planta del pie este en contacto con una superficie, el movimiento de flexion dorsal permita a
