At its simplest, running a distance race such as the Hong Kong Marathon (pictured) is about oxygen, energy and water. Photo: Felix Wong

Six things distance runners need to know, according to scientists, about energy, sweat and ‘the wall’

The science of running marathons explained: why training matters, how muscles get sore, what happens when you hit the wall, and what a runner’s high has to do with marijuana

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At its simplest, running a distance race such as the Hong Kong Marathon (pictured) is about oxygen, energy and water. Photo: Felix Wong
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