S sub 4 hour marathon is a big goal for a lot of marathon runners. But before you even start with such a training plan, there are certain criteria you as a runner should meet. I will let you know if them and why they are important. Another big thing is time you need to dedicate for your training and of course the training structure itself. A sub 4 hour marathon is competitive and therefore a good training structure is important. You'll get the information about what and why in this episode of the podcast. If you need a good sub 4 hour training plan that works, you'll find it on the Run and Smile webpage. And if you want a personalized training plan just use the contact form on the webpage to reach out to me.