or settle for an easy run. It's better to turn up to your race slightly undertrained than not to make it to the start line at all. Distance runners seem to be more susceptible to UPS - studies suggest that it's the volume rather than the intensity
your mileage by at least 10 per cent every fourth week too. Dr Cardinale says: "Undulate the level of work when you're planning your programme. If you build volume and intensity progressively, but scale it back every now and then, you'll still increase
