Rest days aren't easy
The typical marathon training plan has you running four or five days a week. Maybe there's a day for cross-training. And then there's a rest day, which is exactly as it sounds. You're not supposed to do anything. So easy, right?
I was looking forward to rest days, but after five or so weeks or marathon training, I noticed that on "rest days" everything fell apart.
Without my anchor — the act of getting up and running — the rest of my day feels weirdly discombobulated. There is no kickoff. No start to the day. So I end up just kind of floating. And that night I'm not nearly as tired as usual, so I stay up later and am tired for the next day, which is not a rest day and inevitably kicks me in the face.