The various half and full marathon training plans I've read all suggests training at 60-90 seconds slower per mile than expected race pace. Some of them chucks in some speed training to at least give the runner an idea about what race pace feels like.
The logic is (obviously?) that racing is meant to be a full-on activity where one gives everything to place as high in the ranking order as possible and have a good chance of winning the race. And I guess that since many plans are written by experienced ex professional runners turned coaches, that's a logical approach for them.
But many of us (most?) race just because it's something to train towards, it's a fun day out, and it gives us the bragging rights of having done a long race. Whether we finish as number 17,382 or number 11,824 doesn't matter one iota.
The downside (IMnsHO) of training at less-than race pace is (obviously?) that if one has spent six months running hundreds of miles at x minutes per mile, then how can one possibly expect to suddenly be able to run 13 or 26 miles at x minus 1?
I sort of get it for a 5k or a 10k race where I can imagine ignoring the discomfort initially and pain towards the end and just force myself to run faster than I like. When training for a half or a full marathon, 10k becomes "just another gentle run" that is done loads of times. So no biggie if you were to start a little too fast and have to slow down or grit teeths and run through the pain.
But imagine starting out too fast on a marathon and then realising after the first 15 km that you're knackered. Trying to find the grit to "carry on regardless" for another 25 km just doesn't go well with "a fun day out". In fact, it does not go, full stop (at least for me).
And the flip side is that if we train at full race pace, then we risk wearing ourselves out during the training runs. They're meant to build the body up, and the only time anything is supposed to tear it down (if at all) is on the big day itself.
So the way I see it, for those of us who take one shot at "the big one" (whether that's a full or a half) per year, it means quite a lot to try to get it right. It's not like we can just write a rubbish race off and try again next weekend.
Sorry. I'm going around and around the arguments for and against.
In my current training I'm doing 90% of my runs at around 7 min/km which gives a marathon time of just under 5 hours, and that's the pace I hope to maintain as I drag myself around the course in May. The remaining 10% is done at around 5:40 which is my 10 race pace. If I could sustain it for 4 hours it would be a 4 hour marathon, but there is zero chance of that happening anytime soon.
So am I training at race pace? Or am I actually allowing myself to gently cruise through the race at a modest training pace? Could I do "better" than 5 hours if I put my mind to it, pushed the envelope a bit harder and ran some more intervals during training? Possibly. Probably. But it would mean increased injury risk, and it would mean showing up at the starting line without a clue about whether I was able to finish. And with one shot at "the big one" in a year, I don't want to do that.
Sorry for all the waffle. I would be interested in views and opinions and other people's experiences. Do you, like me, plan to race at your training pace, or do you train gently and race hard, or have you found a third option?