Biomarkers help us understand what is going on inside our bodies.  There are many that are very important to endurance athletes.  In this episode Ashley Reaver helps us identify five of these biomarkers, why they are important, what is the normal range and what can we do to correct them if they are outside the normal range. Ashley Reaver is a registered sports dietician with a masters in Nutrition Science and Policy.  She offers nutrition counseling in her private practice and a full-time teacher of nutrition and dietetics courses at the University of California, Berkeley.  She is also the lead nutritional scientist at Inside Tracker.