Good news is that it sounds like you have come out of it better that I have - I could barely walk yesterday and I am still having trouble with stairs today and i am generally absolutely shattered, heavy chest etc - running again is some way off I think!
Whilst i am very happy with my time I think it would have been nicer to have started slower and had something left at the end, rather than being at the limit of blow up pace for the first half and hanging on for dear life for the second. It is pretty clear I pushed myself to the absolute limit.
Some similarities between us here. I did Brighton on Sunday also and i had a big dilemma as to what pace to go out at prior to the race:
- I am 39, running 2 years
- First marathon
- PB for 1/2 (Brighton in Feb) 1:42:40
- Did a 20 mile race in 2:53 6 weeks ago; ran 10 miles at 9mm, then ran next 10 at 8:15 pace, came hoem feeling great!
- I trained about 35 miles per week from January, 3 20+ milers
Based on the above I was convinced I had 3:45 in me. However I posted up my data over on the US RW forum and they had some fairly consistent advice that 3:45 was too much, based on my relatively low milage and limited running history. the advice that stuck with me was "start with the 3:45 pace group and let them go".
In the end I got stuck a way back behind the 3:45 group, and I decided to wear my HR monitor (which i always train with) for the race and use my HR to judge the right effort level.
I ended up raining myself in to around 8:40-8:45 pace for the first half of the race, and i still paid for it in the second where I slowed by about 3 minutes. The undulations of the first half really seemed to take it out of me, and I was tired at mile 17 but kept going and managed to finish in 3:51 just about fighting off cramp the last 2 miles. From about 18 miles I felt I was on the verge of blowing up, and felt utterly destroyed at the end; I am certain that had i gone out following the 3:45 group I would have been walking at around 18 miles; I also think had i ran a more consistent 8:50 pace for the first half I might have got home maybe just under 3:50.
I learnt a few things from all this:
- Race time predictors are not to be trusted unless you are doing high mileage. My HM time almost led me to making a huge and painful mistake on race day, and I was lucky I asked a question on the US forum.
- There is a huge difference between 20 and 26 miles, it really shocked me on the day how much harder it was than the 20 mile race.
- I will be more conservative next time about my pace at the start
- I need to run more miles
I hope my analysis helps yours. I think from my own experience and times you just unknowingly set yourself an impossible pace at the start.
Wow, what an experience. I was told you always remember your first marathon and I won't forget mine! I had to fight myself to not go too fast at the start (I am not sure i managed it entirely) felt great to 10 miles, iffy at 15 and terrible between 18-21; somehow kept going and actually felt much better at 23, where I tried to up the pace and my entire left leg threatened to cramp, so ended up jogging the last mile to ensure I finished.
Came home in 3:51:41 which I am very,very happy about. I turn 40 in the summer and I always wanted to run a marathon before the landmark
Congrats to all here, I only wish I had discovered this thread earlier!