Preparing for the royal distance is a months-long journey that requires iron discipline and smart planning. In our guide, you'll discover the foundations of an effective training periodisation and the secrets of a diet that will protect you from the famous 'wall'. You'll also learn how to use the latest technology to accurately monitor every stage of your form building. Regardless of your seniority, these tips will help you finish a marathon with a smile on your face and a new personal best.