Judo is a martial art that emphasizes the use of quick movement and leverage to throw an opponent. Its techniques are generally intended to turn an opponent's force to one's own advantage rather than to oppose it directly. The opponent must be thrown cleanly, pinned, or mastered through the application of pressure to arm joints or the neck. Judo evolved out of the older martial art jujitsu in late-19th-century Japan, but it is now practiced primarily as sport. It became an Olympic sport for men in 1964; women's judo was added in 1992.