An orthotic device configured to limit expansion of a subject's chest, comprising: an elongated band which wraps, during use, around a chest of a subject comprising a first end and a second end; a first base configured to be removably coupled to the first end of the elongated band; a second base configured to be removably coupled to the second end of the elongated band; and a pulley assembly comprising: a first routing member; a second routing member; an elongated member coupling the first routing member to the second routing member by routing the elongated member through a plurality of first and second openings in the respective first and second routing members such that by applying, during use, a force to the elongated member away from the routing members (310, 320), a distance between the first and the second routing members decreases; a locking mechanism which when activated inhibits, during use, movement of the elongated member relative to at least one of the routing members (310, 320) such that the distance is inhibited from increasing; characterized in that the first routing member is configured to be removably coupled to the first base; the second routing member is configured to be removably coupled to the second base; the first base comprises a first grip and a first grip base; and the second base comprises a second grip and a second grip base. an elongated band which wraps, during use, around a chest of a subject comprising a first end and a second end; a first base configured to be removably coupled to the first end of the elongated band; a second base configured to be removably coupled to the second end of the elongated band; and a pulley assembly comprising: a first routing member; a second routing member; an elongated member coupling the first routing member to the second routing member by routing the elongated member through a plurality of first and second openings in the respective first and second routing members such that by applying, during use, a force to the elongated member away from the routing members (310, 320), a distance between the first and the second routing members decreases; a locking mechanism which when activated inhibits, during use, movement of the elongated member relative to at least one of the routing members (310, 320) such that the distance is inhibited from increasing; characterized in that the first routing member is configured to be removably coupled to the first base; the second routing member is configured to be removably coupled to the second base; the first base comprises a first grip and a first grip base; and the second base comprises a second grip and a second grip base. a first routing member; a second routing member; an elongated member coupling the first routing member to the second routing member by routing the elongated member through a plurality of first and second openings in the respective first and second routing members such that by applying, during use, a force to the elongated member away from the routing members (310, 320), a distance between the first and the second routing members decreases; a locking mechanism which when activated inhibits, during use, movement of the elongated member relative to at least one of the routing members (310, 320) such that the distance is inhibited from increasing; characterized in that the first routing member is configured to be removably coupled to the first base; the second routing member is configured to be removably coupled to the second base; the first base comprises a first grip and a first grip base; and the second base comprises a second grip and a second grip base.