For most runners, doubles are a foreign concept, assumed to be the province only of those cranking out 100-mile weeks. I would like to convince you to think otherwise. Intelligently adding some double days to your programme can help advance your fitness, even if you wind up not s...

You know fish is good for you. ‘It’s a rich source of protein and healthy fats,’ says sports dietitian and running coach Cassie Dimmick (achievingyourbest.net). But actually eating it is another matter, with one survey* finding that one in four of us has no idea how to cook it. B...