I had the estimate at 400 calories in my post (which is on the high end for sure), which is what I know some Ultraman and ultramarathoners aim for in at least t

I had the estimate at 400 calories in my post (which is on the high end for sure), which is what I know some Ultraman and ultramarathoners aim for in at least the first half or bike legs of their race. I believe 200 is enough for amateur runners, but I know professionals really load up since the calories from carbs are definitely more efficiently utilized than fat stores.