Nudging in the U.K.: labeling stairwells in public buildings with calorie counts.

"Using a dedicated website and app, people will be able to scan 'smart signs' on stairs and track their number of calories burnt over time."

Boris Johnson, the Mayor of London, said: “Anything that gets people more active and helps tackle obesity is a good thing in my book. This initiative is a great mix of old fashioned common sense and smart technology to track and incentivise.”

Anything?

StepJockey got a £50 million government grant for that website and app. Its founder Helen Nuki says:

"The world is a gym and we aim to label it as such. It has the added benefit of cutting carbon emissions by reducing the number of lift journeys."

Ah, these Brits, always leading the way. Shakespeare wrote:

All the world's a gym,
And all the men and women merely gymrats:
They have their sidewalks and their stairwells;
And one man in his time burns many calories...