Next time you see another runner out on the street, take a closer look. Is he thinking about smashing his 10K PB next week, or getting smashed at the pub later with his running friends? Is she wondering how she'll fit in next week's training, or how well her new designer lycra shorts fit her bum?
Of course, we all have different reasons for running, but many of us have more in common than you might think. We've looked at the evidence and come up with four general categories of runner, characterised by the way they run, how they think about running and how they manage the rest of their lives. If you're the type of runner who likes questionaires, try this one* - you'll find out what kind of runner you are, how you can get more out of your sport, and what you can learn from the other 'types'.
* Please answer all the questions to allow us to assess your running type.