Certain traditional combat sports and fighting styles exist all over the world, rooted in local culture and folklore. The most common of these are styles of folk wrestling, some of which have been practiced since antiquity and are found in the most remote areas. Other examples include forms of stick fighting and boxing. While these arts are based on historical traditions of folklore, they are not "historical" in the sense that they reconstruct or preserve a historical system from a specific era. They are rather contemporary regional sports that coexist with the modern forms of martial arts sports as they have developed since the 19th century, often including cross-fertilization between sports and folk styles; thus, the traditional Thai art of muay boran developed into the modern national sport of muay Thai, which in turn came to be practiced worldwide and contributed significantly to modern hybrid styles like kickboxing and mixed martial arts. Singlestick, an English martial art can be seen often utilized in morris dancing. Many European dances share elements of martial arts with examples including Ukrainian Hopak, Polish Zbójnicki (use of ciupaga), the Czech dance odzemek, and the Norwegian Halling.