Between 8am and 6pm each day Shim Jae-duk is one of the 45,000 workers at DSME’s Okpo shipyard on Geoje Island, near Busan in South Korea. But outside these hours he reclaims his self-dubbed alter ego, “Golden Legs”.

The polite, gently spoken Shim surprised himself when in 1992, with his breathing poor, doctors told him his lungs were in bad condition and he decided to take up running to improve his health.

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