Training plans Half marathon
The sub-1:55 half marathon
To break 1:55 for the half marathon, you need an average of 5:27 per kilometre — 8:46 per mile — from gun to tape. Most runners get there on 44–62km per week across 4–5 runs, built over roughly 10–14 weeks. Expect three gears in the plan: 6:22–6:57/km for easy runs, roughly 5:15/km for tempo sessions, and 4:60/km for intervals. Your starting fitness decides whether the goal is a season away or further — judge it from a recent race, not a hopeful guess.
Last updated 2026-07-03 · paces computed, not copywritten
Goal pace
5:27/km
8:46/mi
Typical build
10–14 weeks
44–62 km/week
Runs per week
4–5
3 key sessions + easy volume
Required paces
| SESSION | PACE (/KM) |
|---|---|
| Easy runs | 6:22–6:57 |
| Long run | 5:52–6:22 |
| Tempo | 5:15 |
| Intervals | 4:60 |
| Race pace | 5:27 |
Splits at goal pace
| CHECKPOINT | CLOCK |
|---|---|
| 5K | 27:15 |
| 10K | 54:31 |
| 15K | 1:21:46 |
| Finish | 1:55:00 |
The table assumes level pacing; most runners land a 1:55 by holding two or three seconds per kilometre back from 5:27 early on.
A typical week
Key session 1
Intervals — reps around 4:60/km (5K effort) with jog recoveries
Key session 2
Tempo — sustained comfortably-hard running near 5:15/km
Long run
The week's cornerstone at 5:52–6:22/km, adding 1:55-pace finishes as race day nears
Plus 2+ easy runs. Everything else is easy running at 6:22–6:57/km — the volume that makes the hard days land.
Asked often
- What pace is a sub-1:55 half marathon?
- 5:27 per kilometre, held for the full half marathon. The runners who break 1:55 are usually the ones still passing people in the last quarter.
- How long should I train for a sub-1:55 half marathon?
- From a reasonable base, 10–14 weeks. If you're returning from a break, rebuild first — squeezing a 10-week plan into less is how half marathon builds break.
- What happens if I miss training weeks?
- If the plan can't adjust, missed weeks turn into injury risk or a blown goal. RunV recalibrates after every run — including the ones that didn't happen — to keep 1:55 in reach.
This fitness at other distances
- Marathon: 3:59:46 equivalent
- 10K: 52:07 equivalent
- 5K: 25:00 equivalent
Sub-1:55, minus the guesswork
RunV builds your sub-1:55 plan around your week, then recalibrates it after every run — finished, cut short, or missed.
