Diagnostic corner: Athlete’s foot

Jamaica: Athlete’s foot mainly affects experienced runners who cultivate a tendency to strike the ground with one foot much more frequently than the other – such as two impacts with the right foot for every left foot contact on a 5km run. 

This can cause one foot to over-develop, often becoming two or three sizes larger than the underused foot and causing consternation among race officials and puzzling looks from fellow competitors.

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World Health Observatory says: As beneficial as it is to mix up your exercises, just try and run like an adult or legal guardian. There’s a reason Usain Bolt was so successful – he would take turns with his feet hitting the ground, almost without fail. 

Except towards the end when he was losing to junkies and children, because he was also beset by the affliction. Run normally!