Here is a cool concept that helps you keep your knees protected and relieves tension in your muscles after a tough workout. The Energy Storage Heating Knee Pad uses induction-generated energy to relax your muscles. The heat penetrates deep tissue to promote circulation. The blue light indicates when the energy-storage mode is on whereas the red-light indicates heat-release mode. This awesome concept is by Prof. Aqua Chuan-Yu Chen and Chou Yi-Jin of Ming Chuan University.