When training for a half marathon we have to make sure that we progressively increase distance, but not at the expense of speed. As we saw from the study cited earlier, the half marathon is largely a war of attrition - your aim is to gradually empty the tank over the 13.1 miles and less emphasis is placed on strategy and saving energy back for a prolonged late kick.
With that in mind, there’s an argument for a condensed periodisation approach, with the base level endurance work limited and much more emphasis placed on speed endurance. Likewise, there’s limited requirement for top-end speed because it’s not as much of a feature.
There’s credible research pointing towards less focus on volume and more focus on intensity  when it comes to speed endurance. The goal should be to improve your ability to maintain a faster speed for a longer period of time, which mirrors the most effective half marathon strategy.
Fewer, but faster miles.
Studies predicting half-marathon success in recreational runners also back up this approach. A 2014 investigation found that running speed in training was the most accurate predictor of half marathon success . If you want to run a half marathon well, you absolutely must spend the majority of your training time maintaining a fast average speed.
Depending on your starting point, your 12 week training programme should be broadly split like this…
- Weeks 1-3: Building stamina
- Weeks 4-10: Building speed endurance
- Week 11: Building top end speed
- Week 12: Taper ahead of race