An orthosis includes a first arm cuff for attachment to a first body portion, a first arm member, a first extension member, a second cuff for attachment to a second body portion, a second arm member, and a second extension member. The orthosis can also include a drive assembly comprising a knob and a shaft. The first cuff and the second cuff may each include at least one cuff strap and at least one loop connector for receiving the at least one cuff strap. A method of using the orthosis includes coupling a first cuff to a first body portion, coupling a second cuff to a second body portion, wherein the second cuff is coupled to the first cuff, and rotating the first and second cuff from a first position to a second position, relative to the second cuff.