Knees can be used forwards (called a straight knee) or from an angle (called a roundhouse knee). Other variants include the downward knee and crescent knee strikes. They can be applied while standing, especially in a clinch, on the ground (in some situations), or while jumping (this is commonly seen in Muay Thai). Targets include the thigh, groin, ribs, solar plexus, and head. Due to their effectiveness, they are very common in traditional martial arts such as hapkido, taekwondo, karate, and Silat, among others. This article is a . You can help My English Wiki by expanding it.