Hapkido, one of the Korean martial arts, has been gaining a huge following in recent years as a practical method of self-defense. This is perhaps because Hapkido does not require great size or strength-its comprising words hap (to combine harmony, unity), ki (power of mind, body and spirit, inner strength), and do (the way), or "the way of coordinated (harmonizing) power," clearly show the emphasis on combined power of the mind, body, and spirit. Technically, Hapkido also contains a variety of techniques, including grappling, striking and kicking. Although occasionally confused with Aikido because of similar roots and the same translation, Hapkido is distinct as an integrated, versatile, and almost "scientific" martial art.