Ali retired from boxing undefeated and has since taken her fighting skills outside of the ring.

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Back in London, Mr. Barton-Wright combined the Asian fighting skills he learned abroad, such as judo and jujitsu, with Western European styles of boxing, savate or kickboxing, and stick fighting.

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While the regular routine is challenging on its own, about eight weeks before a match, he and other fighters undergo "training camp, " where the intensity is dialed up yet again and the emphasis shifts to technique and fighting skills.

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In spite of its gentle impression, Taekkyeon is an effective martial art highlighting a broad variety of offensive and defensive skills employing all available fighting methods.

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When the fighting was over, he would say, he would use his engineering skills to help rebuild the country.

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The focus now is on "soft skills, " basics like showing up on time, dressing appropriately and not fighting with co-workers.

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