Quote: (Originally Posted by
daviddem)

Yes I know it is 42k, but that phenomenon known as "the wall" happens at around 32k. It takes a lot of will to continue from that point, better be psychologically prepared for it. Physiologically, it has something to do with having burnt all your sugars and switching to fat burning.
Common advice is also to stop training a few days or a week before the event and load up on carbohydrates.
Sorry didn't read what you wrote properly - all that running has fried my brain
I'm not a runner - I struggle with it. I don't think I am anywhere near fit enough to run properly so I'm just going to chill and enjoy myself. Hopefully!