Balance is the Key to reaching the extreme goal.  I blogged about it here ->  Perusing an extreme goal

Yesterday while friends were completing the Oxfam Trail Walk,  I was deeply engrossed in rewriting a section of my novel and it was going well.  A character was developing. I had a pronominal urge to write and did not want to stop writing lest the great ideas stop flowing as freely and as well as they were coming.

I went four hours beyond the time I had planned to exercise, as I knew my novel, which is for me a very important goal, would suffer if I left it at that stage.
I kept postponing the deadline to stop writing and get some exercise.
I have wanted to write this novel since I was thirteen years old.  That is 52 years of postponing something I had wanted to do.  My mother held this same goal and died before realizing it.  I turn 65 this year.  Every year from now on increases my risk of dementia and never having the brain capacity to write my novel.  I MUST write my novel this year.   Maybe this is why they say seniors need less sleep than younger people, lol :-) maybe a lot of us are perusing an extreme goal as we know time is running out for us and it is now or never.  Our goal means we have to make cuts somewhere and sleep is one of the things we may need to cut back on (within pre-set sane living limits) in order to achieve the goal.