You may have spotted people carefully studying retro-futuristic looking wristbands with flashing digits. You may already own such a thing and now be oddly obsessed by those LED readings. The Nike+ FuelBand has become a favourite tool for those intent on turning their daily life into a constant data stream or who simply want to put a number to how active or inert they have been in any one day.

The Nike+ FuelBand, using smart sensors and complex algorithms, rewards you with NikeFuel depending how much you have moved. Aiming to encourage more get up and go, and recruit more Fuel Bandits, Nike has now produced a new take on the London Tube map, charting how many NikeFuels you would earn if you decided to walk between stations (Zone 1 only) rather than get shunted around underground.

'Urbanist', researcher and keen walker John Bingham-Hall walked the routes - adding scenic diversions here and there - and clocked up the NikeFuel points. These were then crunched and converted into cartography proper by the Centre for Advanced Spacial Analysis, part of University College London. The results were then handed to designer and 'visualiser' David Luepschen to turn into a graphically pleasing map, downloadable here or at www.nike.com/fuelband. A pocket-sized version of the map is also available in key London Nike stores.