>General Running>How many _long_ long runs?
Your toughness is made up of equal parts persistence and experience. You don't so much outrun your opponents as outlast and outsmart them, and the toughest opponent of all is the one inside your head." - Joe Henderson
I'm surprised you separate 19-milers from 20-milers on your schedule.
Out of couriosity what do mean by that?
Just that there's not much difference between 19 and 20 miles.
I actually wondered the same thing.