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The Japanese martial art of Karate focuses primarily on deflecting opponent’s attacks. Since most attackers will kick and punch in straight lines, karate takes advantage of these predictable patterns to exploit exposed points.
For example, a practitioner may avoid a punch by shifting to the side; then quickly counter with punches into ribs, evening slipping round back to hit kidneys.
These counterattacks are hard to defend against and usually focused on damaging the most vulnerable areas of an opponent.