I have completed three half marathons and didn't think too much about "how" to run the event. The first one I just ran it and tried to maintain a certain average pace - which I basically did but was VERY tired by the end. The second one I had a time to beat if possible - so that was prominent in my thinking during the event. The third one I started out believe in that I would not be able to beat the second half's time - but got caught up in the event and ran it even faster.
BUT - for my upcoming full marathon - I am only running it to "finish in an upright position" - but I also want to complete it within the cutoff time which would necessitate an average pace of 9 mins per K. I am now up to doing a 24K longrun this weekend - so far I have been going OK, my pace for the training longruns has been a little bit faster than 9 mins but there is a long way to go to 42K. All the "experts" say to either run the event at a flat average pace all the way - while others say to take it slowly for the first half and perhaps increase pace over the last half (negative splits) . Some non-expert friends who have completed the distance say to run just a little bit faster than average to "bank" some spare time as you WILL slow down over the second half.
SO - three strategies that could be followed. A fourth strategy often promoted is just to run how you feel - but I can see how that could lead to a blowout in the first half when you are still feeling "good "
What do others here think about all this ? What has been your experience ?