The whole article is great for anyone interested in the nuts and bolts of running. Give it a read http://www.letsrun.com/news/2017/12/qa-2017-usatf-marathon-champ-tim-ritchie-explains-ran-211-off-85-miles-per-week-learned-eliud-kipchoge/
Q&A with Tim Ritchie, CIM ChampWritten by Kevin Mangan
Jonathan Gault of Letsrun recently did a great interview with newly crowned USA Marathon Champ Tim Ritchie. In the interview they get into some really good training insight. A couple of the best nuggets of wisdom in the article included Ritchie's explanation of his relatively low-mileage and how at this point in his running career that is what works best for him. Although some might say it's not ideal, he knows he can be consistently healthy and make progress through a training cycle. Also, his take on the simplicity of his training is quite good.