I'm asking you to donate as much money as you can to the RICE Institute because they do fantastic work for patients and families affected by dementia.

In return, I will endure 4+ hours of boredom, pain, dehydration, hunger, bleeding nipples, blisters and underpants creeping up higher and higher (which I can't adjust because of the number of spectators). And that's just on the day of the marathon - bear in mind all the training I have to do just to get to the starting line.