![Science Of Ultra show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/070/065/small/science-of-ultra-ultra-marathon-and-trail-running-expertise-world-leading-endurance-science-and-coaching.png)
Summary: Have you heard this before…keep your easy days easy and your hard days hard? In this episode, you’ll learn some of the physiologic bases for why you should train mostly in the moderate domain, some in the severe domain and little to none in the middle (the heavy domain).