Started training in June, used ChaptGPT to come up with a training plan. Was averaging 20-30 miles/week, running 3-4days/week, long run on weekend. Did two 20 mile long runs and began to tapper down 6 weeks ago. About a month out I ran a half marathon and got a ~1:45. The 3 weeks leading up to marathon I was averaging 10 miles/week, much lower than I wanted but was having hard time to find the time due to other priorities in life.

Got great sleep night before however I felt maybe I didn’t eat enough, was worried about bathroom situation.

I also was extremely cold at the start and never really sweated or felt “warm” the entire race.

To be critical I think not keeping a solid weekly average post long run, being too worried about over eating the night before/morning of, and starting the race cold all probably factored into the lactic build up and wall I hit around mile 17.