Wearable electronic devices, namely, printed and stretchable electronic circuits incorporated into arm braces, leg braces, knee braces, gloves and apparel for sensing muscle, joint and body movements; wearable electronic sensors for sensing and measuring body movement; electronic circuits; wearable electronic circuits; conductive materials, namely, encapsulated gels being integral component parts of flexible and stretchable printed circuits used for conducting heat, electrical charges and static electrical charges