Elastic inner garment, suitable for wearing by a person who engages in a motorcycle sports activity, which incorporates in its structure a plurality of sensors to detect physical parameters (10, 12, 16, 18, 22) and / or sensors to detect biomedical parameters (20, 30) of the person wearing it and comprising an electronic device (100), said electronic device (100) being connected by means of connections (120) to said sensors (10 , 12, 16, 18, 22) and comprising means (102) for acquiring and processing the information supplied by said sensors (10, 12, 16, 18, 20, 22, 30) and a memory structure (104) for recording the data related to the parameters detected by said sensors (10, 12, 16, 18, 20, 22, 30), at least one of said sensors (10, 16, 18, 22) being intended to detect the pressure exerted by the garment on the person's body during all phases of execution of said a activity, characterized in that said elastic undergarment comprises an aerodynamic hump that provides a housing, in a position protected against impacts, for said electronic device (100).Prenda interior elástica, apta para que la lleve puesta una persona que se dedica a una actividad deportiva de motocicleta, que incorpora en su estructura una pluralidad de sensores para detectar unos parámetros físicos (10, 12, 16, 18, 22) y/o unos sensores para detectar unos parámetros biomédicos (20, 30) de la persona que la lleva puesta y que comprende un dispositivo electrónico (100), estando conectado dicho dispositivo electrónico (100) por medio de unas conexiones (120) a dichos sensores (10, 12, 16, 18, 22) y comprendiendo unos medios (102) para adquirir y procesar la información suministrada por dichos sensores (10, 12, 16, 18, 20, 22, 30) y una estructura (104) de memoria para grabar los datos relativos a los parámetros detectados por dichos sensores (10, 12, 16, 18, 20, 22, 30), estando al menos uno de dichos sensores (10, 16, 18, 22) destinado a detectar la presión ejercida por la prenda de vestir sobre el cue
