A knee strike (commonly referred to simply as a knee) is a strike with the knee, either with the kneecap or the surrounding area. Kneeing is a disallowed practice in many combat sports, especially to the head of a downed opponent. Styles such as kickboxing and several mixed martial arts organizations allow kneeing depending on the positioning of the fighters. Knee strikes are native to the traditional Southeast Asian martial arts and traditional Okinawan martial arts.