Abstract: An orthosis for supporting a body portion of a user, for example, a hip joint or spine that has been compromised, can utilize an adjustable extension unit that can be appropriately secured, for example, to anchor locations on the body between the waist and a thigh of the patient. A body support unit with a compliable support surface can conform to a body surface part of the user, such as the leg, while being movably mounted across the adjustable extension unit between the anchor locations. The adjustable extension unit can include a pair of telescoping elongated members that are relatively movable and both the body support unit and the collective length of the telescoping elongated members can be adjusted and fastened at a desired location by activation of a control member.