Can We Define Endurance Challenges?

There are people that do and define endurance by, like myself, anything more than 90 minutes. So for our purposes, in terms of the th that we are likely to talk about, can we define that? We are talking about long distance challenges in es. And i think we are to distinguish s them. If we want a differential diagnosis here to saca, what isnt it's that they are of a duration where a certain unique set of challenges arises. Yes, it may not arise in shorter duration exercise. Aso, also a lot of so then we have a wide spectrumsecly.