GETTY IMAGES The possibility of shaving a few seconds off a personal best, or running further than we ever thought we could, can lead us towards ever more inventive ways to train. But what
, where it's needed, so it's a good idea to train yourself to run with a reasonably full stomach and top it up regularly. Take frequent small sips to prevent overloading your stomach. Try running a three- to five-mile circuit around your home and stop off
