In the UK and across the world, running is increasing in popularity. So why are we running now more than ever?

Running is experiencing an explosion in popularity in the UK and across the world. So why are we running now more than ever - the recession, the Olympic competitive factor, the new social media app revolution, public health awareness, mid-life crises or rising life expectancy? Mike Williams, not exactly a natural runner, tests out these theories and is persuaded to try barefoot running himself.