The correct footwear is essential, and the right set of trainers can make or break a great marathon training plan. Go to your local running or sports store and speak to the experts. They will be able to give you some great advice. Most running shops will also be able to provide ‘gait analysis’, which will analyse your running style, and help choose the perfect shoe for you.
As well as shoes, you should invest in good quality running shorts or leggings, technical running t-shirts, a running jacket or two (for those cold winter runs) and some running socks. All of these will help your performance, but be prepared to become very familiar with your washing machine!