Introduction

Dina Griffin is a board-certified sports dietitian and founder of Nutrition Mechanic. She has completed the Leadville 100 and Comrades Ultra races as well as running Sub 330 in both the New York City and Boston marathons. Dina served as a guide for Diane Berberian at the ITU Paratrath on World Championships in London 2013. Dirk Friel, co-founder of Training Peaks: We hope these stories inspire you to get out there, train the purpose, and never be afraid to sign up for that next big challenge.