Weighing in at 120 kilogrammes (265 pounds), a smoker and drinker revelling in Hong Kong's hedonistic expat scene, David Gething was heading for a heart attack by his 40th birthday.
He could so easily have ended up a health statistic, another casualty of the city's excesses, he says. Instead he funnelled his energy into sport -- and ran right into the record books.
Aged 41, Gething has two world marathon records under his belt and has just released a book about his racing adventures, Relentless.