We assessed BRT for 5 different commonly used knee braces ( right leg ) used in 9 different settings : without a knee brace ( control group ) ; with a typical postoperative knee brace with adjustable range of motion ( ROM ) and the settings of 0 to 30 , 0 to 60 , 0 to 90 , and 20 to 90 ( extension and flexion ) ; and with an unloading knee brace for moderate to severe unicompartmental osteoarthritis , an orthosis for ligament instabilities , a knee brace for patellofemoral disorders , and an elastic knee bandage .