A configurable orthosis comprising: a first link configured to extend along a lateral side of a first limb segment of a limb of a user when the orthosis is worn by the user; a second link configured to extend along a lateral side of a second limb segment of the user's limb when the orthosis is worn by the user, the user's second limb segment joined to the user's first limb segment by a physiological joint of the user that articulates about at least a first physiological joint axis, the second link being connected to the first link proximate to the first physiological joint axis at a lateral side of the physiological joint, the lateral side of the user's second limb segment being adjacent said lateral side of the user's first limb segment; a plastically deformable precursor member removably affixed to the first link, the precursor member including a first contact surface; and a first support member movably connected to the first link for movement to a fixed first support member adjustment position relative to the first link, said movement of the first support member to the first support member adjustment position configured to engage and deform the precursor member and to move said first contact surface into contact with a first contact portion of the user's first limb segment, when the orthosis is worn by the user, the first contact surface of the precursor member configured to transmit an aligning force to said first contact portion of the user's first limb segment to urge or restrain a first articulation of the user's first limb segment about the first physiological joint axis relative to the user's second limb segment. a first link configured to extend along a lateral side of a first limb segment of a limb of a user when the orthosis is worn by the user; a second link configured to extend along a lateral side of a second limb segment of the user's limb when the orthosis is worn by the user, the user's second limb segment joined to the user's first limb segment by a physiological joint of the user that articulates about at least a first physiological joint axis, the second link being connected to the first link proximate to the first physiological joint axis at a lateral side of the physiological joint, the lateral side of the user's second limb segment being adjacent said lateral side of the user's first limb segment; a plastically deformable precursor member removably affixed to the first link, the precursor member including a first contact surface; and a first support member movably connected to the first link for movement to a fixed first support member adjustment position relative to the first link, said movement of the first support member to the first support member adjustment position configured to engage and deform the precursor member and to move said first contact surface into contact with a first contact portion of the user's first limb segment, when the orthosis is worn by the user, the first contact surface of the precursor member configured to transmit an aligning force to said first contact portion of the user's first limb segment to urge or restrain a first articulation of the user's first limb segment about the first physiological joint axis relative to the user's second limb segment.