One of the most important decision that you might have could be deciding on completing a Marathon.
I have completed my first Marathon in 2002, it was the first Standard Chartered Singapore Marathon and support then was incredible and it was not packed with lots of runners.
I did not think much then about recovery and what’s going to happen days or week after finishing this, I just decided to do it. On the next day in office, I was greeted by a flight of stairs that leads to my working area. I had difficulties then navigation up & down that flight for the next few days.
The only Marathon that I completed without having much of this issue is the most recent Kagoshima Marathon 2018. I can still continue to explore the observatory on that day itself. It takes me quite sometime to reach this state but I eventually achieved it.
Hope that your experience was and will be much better mine.