How about this for an alternative tube map?It shows the number of steps estimated to be needed to walk between tube stations.
Thanks to 'PruHealth', the Private Medical Insurer for creating it.
Given that 2,000 steps could burn around 100 calories you could work out your entire exercise requirements using this map.
And what about efficiency? Having been a regular tube user, and given that average walking speed is around 3-4mph I reckon walking is actually quicker than using the circle line ;-)
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