Treat sub-2 as a pacing problem and a readiness question
A sub-2-hour half marathon requires an average pace of about 5:41 per kilometre or 9:09 per mile across 21.1 km. That arithmetic is a target, not proof of readiness. Build the plan from recent repeatable running, controlled threshold work, long-run durability, and the ability to recover.
Use three checkpoints
| Checkpoint | Useful evidence | Decision |
|---|---|---|
| Easy durability | consistent easy frequency and normal recovery | maintain or add modest volume |
| Controlled speed | repeatable work near threshold without a time trial | progress duration before pace |
| Race-specific rhythm | bounded blocks near goal pace | hold the target, adjust it, or add runway |
No single workout guarantees a result. Weather, course, congestion, health, pacing, and fueling can change race-day execution.
Build the week around distinct jobs
- Easy runs create frequency and absorb harder work.
- One quality session develops controlled speed.
- One long run builds durability and practises familiar fueling.
- Strength supports force and running economy when it does not crowd the key runs.
- Rest or recovery protects the next useful session.
Concurrent-training evidence supports strength as part of endurance preparation, but programme design varies. Keep the final race-week strength exposure familiar, low cost, and far enough from the race that soreness does not become the main signal.
Use a four-step pace rehearsal
- Confirm calculator pace on a measured, suitable surface.
- Run short controlled blocks and compare effort, form, and recovery.
- Extend only when the same pace remains stable late in the session.
- Practise the opening kilometre conservatively so goal pace is not spent in the first crowd.
Use the half-marathon hub, pace calculator, first-5K pacing plan, and race-week strength adjustment.
Safety boundary
Stop for chest pain, fainting, severe breathing difficulty, or pain that changes normal movement. This guide is educational and not medical advice, an individualized pace prescription, or a guaranteed sub-2 finish.