Anecdotes are what they are but I'm happy to hear I'm not alone in experiencing this phenomena. From what I understand humans have evolved to run incredibly lon

Anecdotes are what they are but I'm happy to hear I'm not alone in experiencing this phenomena. From what I understand humans have evolved to run incredibly long distances relatively efficiently because much of our densest caloric intake (historically) came as a result of simply chasing down our prey until it essentially collapsed from exhaustion. Even though I live in modern times my practice of running what is a relatively long distance (5k) before eating seems to be an incredible "hack" compared to more typical, modern patterns of diet and exercise.