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How much walking burns off a blueberry muffin?

48 minutes is the answer and health professionals now want this information included on food packaging. Shirley Cramer is Chief Executive at the UK's Royal Society of Public Health; she says that the majority of people aren't aware of how much exercise they need to do to burn off calories.

(Photo: Blueberry muffin
Credit: BlakeDavidTaylor)

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3 minutes