This technology utilizes a circuit fabric, replacing traditional sensors and wires with conductive fibers that are seamlessly woven into the elastic knee brace. The brace provides precise positioning upon wearing, eliminates the need for disposable electrodes, and addresses the low motivation for home training and high equipment costs among elderly patients with knee osteoarthritis. The knee brace integrates three functions—knee joint angle measurement, surface electromyography (sEMG), and electrical stimulation—making it simple and easy to use.