Training guide
Sub-2 Half Marathon Training Guide
To run a sub-2-hour half marathon you need to average about 5:41 per kilometre (9:09 per mile) for 21.1 km. Training centres on holding that pace comfortably: weekly tempo runs at or just faster than goal pace, long runs with race-pace finishes, and enough easy volume to make 5:41/km feel sustainable rather than maximal.
- Plan length
- 10–12 weeks
- Weekly volume
- 4–5 sessions, ~40–60 km
Overview
Breaking two hours requires averaging 5:41 per kilometre across the full 21.1 km. The training goal is to make that pace feel controlled, not heroic — which means a lot of easy aerobic running plus targeted work right around goal pace.
The two highest-value sessions are tempo runs (to raise the pace you can sustain) and long runs that finish with several kilometres at 5:41/km. Rehearsing goal pace on tired legs is the best predictor that you can hold it on race day.
A typical training week
| Mon | Rest or easy run |
|---|---|
| Tue | Intervals (e.g. 5 × 1000m slightly faster than goal pace) |
| Wed | Easy run |
| Thu | Tempo at goal pace (20–35 min at 5:41/km) |
| Fri | Rest or easy run |
| Sat | Easy run + strides |
| Sun | Long run with last 4–6 km at goal pace |
Key workout types
Goal-pace tempo
Trains your body to hold 5:41/km for longer stretches.
Race-pace long-run finishes
Rehearses goal pace on fatigued legs.
Intervals
Builds a buffer of speed above goal pace.
Easy runs
Aerobic base that makes goal pace sustainable.
Goal-pace splits
Even splits at goal pace (5:41/km · 9:09/mi). Aim to pass each marker on time — or a touch behind early, never ahead.
| Distance | Elapsed |
|---|---|
| 5 km | 28:26 |
| 10 km | 56:53 |
| 15 km | 1:25:19 |
| 20 km | 1:53:45 |
| 21.1 km | 2:00:00 |
Frequently asked questions
What pace is a sub-2 half marathon?
About 5:41 per kilometre, or 9:09 per mile, held for the full 21.1 km. Banking even a few seconds per km early often backfires.
Is a sub-2 half marathon realistic for me?
If you can already run a half around 2:05–2:10, sub-2 is a reasonable 10–12 week target. If you are further out, build base fitness first.
How do I pace a sub-2 half?
Aim for even splits at 5:41/km, or a slight negative split. Going out at 5:25/km to "bank time" is the most common way runners miss the goal.
Run your plan smarter with Pacexis
Pacexis sits between your plan and your watch — pacing every session with intent and learning from every run.
Explore Pacexis