Last reviewed: April 2026
Triathlon Pacing Strategy
The rule for every triathlon is the same: swim controlled, ride disciplined, run hard. Use threshold-based pacing (anchored to lactate threshold heart rate or functional threshold power) rather than feel, because perceived effort lies — especially in the first hour.
How do you pace a triathlon?
- • Swim at 70–80% effort — breathing every 2–3 strokes, no lactic burn.
- • Bike at 70–85% of FTP (lower for longer races).
- • Run at 85–95% of threshold pace, negative-splitting the second half.
- • Never burn matches on the first 10 minutes of any leg.
- • If in doubt, ride 5W easier — you will always run faster.
Pacing targets by distance
| Distance | Swim effort | Bike (% FTP) | Run (% threshold) |
|---|---|---|---|
| Sprint | 85% | 90–95% | 95–100% |
| Olympic | 80% | 85–90% | 92–97% |
| 70.3 | 75% | 75–82% | 85–92% |
| Ironman | 70% | 68–75% | 78–85% |
Finding your thresholds
- Run threshold pace: 30-minute time trial, average pace = lactate threshold pace.
- Bike FTP: 20-minute TT × 0.95 = FTP. Re-test every 6–8 weeks.
- Swim CSS: (400m TT − 200m TT) / 2 = critical swim speed per 100m.
- Use the Pace Converter to translate between min/km and min/mile.
- Use the Race Time Calculator to sanity-check your goal time.
Classic pacing mistakes
- Blowing the swim start. The first 200m adrenaline spike costs 30–60s of recovery across the full race.
- Over-biking. Ironman riders routinely lose 20–40 minutes on the run by pushing 10W too hard on the bike.
- Chasing on the run. Going with someone 30 seconds per km faster than your plan wrecks the final third.
- Ignoring heat. Temperatures over 25°C raise effective effort; drop bike power by 5% and run pace by 10–15 sec/km.
Try a calculator
- Triathlon Race Time Calculator
Apply your pacing strategy to predicted splits.
- Pace Converter
Convert between min/km, min/mile, kph and mph.