Parkour. Developed in France Parkour is derived from gymnastics and other martial arts. Parkour focuses on self defense through tactical retreat. Needless to say it takes a lot of guff for it. However the art continues to grow because it is fun and looks awesome. As a martial art I must give it some credit. Tactical retreat is sometimes a very good option.
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Judo is an extremely popular martial art. It involves various hand techniques like Seoi-nage, Tai-otoshi, Kata-guruma, Sukui-nage, Uki-otoshi, Sumi-otoshi,Yama-arashi, Ippon-seoi-nage which helps in overpowering the opponent. Brief overview of these hand techniques has been discussed.