An orthotic device (100) configured to limit expansion of a subject's chest, comprising: an elongated band (110) that surrounds, in use, a subject's chest comprised of a first end (140) and a second end (160)； a first base (150) configured to engage the first end (140) of the elongated band (110)； a second base (170) configured to engage the second end (160) of the elongated band (110)； and a pulley assembly (120) comprising: a first travel element (310)； a second path element (320)； an elongated member (300) that couples the first path member (310) to the second path member (320) by leading the elongated member (300) through several primary (330) and secondary (340) openings of the respective main (310) and secondary (320) paths so that applying a force to the elongated element during use (300) away from the path elements (310, 320), decreases the distance between the first (310) and the second (320) path element； a locking mechanism (130) that, when activated, prevents, during use, movement of the elongated limb (300) with respect to at least one of the path elements (310, 320), so as to prevent it from the distance increases, and characterized in that the first path element (310) is configured to engage the first base (150)； the second path element (320) is configured to engage the second base (170)； The first base (150) comprises a first handle (200) and a first grip base (220)； and the second base (170) comprises a second handle (210) and a second grip base (230).Un dispositivo ortótico (100) configurado para limitar la expansión del pecho de un sujeto, que comprende: una banda alargada (110) que rodea, durante el uso, el pecho de un sujeto compuesta por un primer extremo (140) y un segundo extremo (160)； una primera base (150) configurada para acoplarse al primer extremo (140) de la banda alargada (110)； una segunda base (170) configurada para acoplarse al segundo extremo (160) de la banda alargada (110)； y un conjunto de polea (120) que comprende: un primer e
