Kickboxing is a stand-up combat sport based on kicking and punching, historically developed from karate mixed with boxing. Kickboxing is practiced for self-defence, general fitness, or as a contact sport. Japanese kickboxing originated in the late 1950s, with competitions held since then. American kickboxing originated in the 1970s and was brought to prominence in September 1974, when the Professional Karate Association (PKA) held the first World Championships. Historically, kickboxing can be considered a hybrid martial art formed from the combination of elements of various traditional styles.