Welcome to your Marathon Plan! This is an 18 week intermediate training plan and will help you get tp the start line injury free. 80/20 training is highly effective and you spend 80% of your time working out at a low intensity and 20% at a high intensity. This method will enable you to get your volume of running need for your marathon without breaking down and helping to avoid injury. Runs will become more pleasant and less draining You'll carry less fatigue from one run to the next Your ...