A first aspect of the present invention relates to a modular garment system, the system comprising: a. a jacket-like module, and/or b. a trouser-like module, and c. optionally, a hood-like module, wherein each of said modules comprises at least two fastening elements configured to provide a resistance to the movement of a subject's body being contacted by said at least two fastening elements and a compression to said subject's body being contacted by said at least two fastening elements. A second aspect of the present invention relates to a method for improving physical performance in a subject, the method comprising the steps of a. providing to a subject at least one module of the modular garment system according to the first aspect of the present invention, b. measuring in said subject one or more parameters before said subject performs a physical activity, c. measuring in said subject one or more parameters after said subject has performed said physical activity, wherein a change in one or more parameters indicate an improvement of the physical performance in said subject. A third aspect of the present invention relates to a kit for rehabilitation and/or training of a subject, the kit comprising: a. a jacket-like module, b. a trouser-like module, c. an elastic band (3), and d. optionally, a hood-like module, wherein said modules are configured to reproduce a modular garment system according to the first aspect of the present invention.Un premier aspect de la présente invention concerne un système de vêtement modulaire, le système comprenant : a) un module de type veste et/ou b) un module de type pantalon, et c) facultativement, un module de type capuche, chacun desdits modules comprenant au moins deux éléments de fixation conçus pour assurer une résistance au mouvement du corps d'un sujet en contact avec lesdits au moins deux éléments de fixation et assurer une compression audit corps du sujet en contact par lesdits au moins deux éléments de fixation. Un deuxième
