70.3 Two-Week Taper: The Science Behind a Shorter Taper
The 70.3 half-ironman (1.9K swim + 90K bike + 21K run) is roughly half the distance of an IM, with finish times of 4.5–7 hours. Its taper cannot simply copy the IM’s 3-week version.
Why 70.3 Uses 2 Weeks
Comparing fatigue accumulation across the three disciplines:
| Event | Fatigue Accumulation Timeline | Full Recovery Time |
|---|---|---|
| Marathon | Peaks 3–4 weeks pre-race | 14–21 days |
| IM 226 | Peaks 4–5 weeks pre-race | 14–21 days |
| 70.3 | Peaks 2–3 weeks pre-race | 10–14 days |
| Olympic Tri | Peaks 1–2 weeks pre-race | 7–10 days |
The 70.3 training load is not as extreme as an IM, so a 14-day taper is sufficient for supercompensation; any longer and you risk losing fitness.
Two-Week Taper Structure
Week -2 (Total hours from 15h → 9h, a 40% reduction)
| Day | Workout |
|---|---|
| Mon | Rest |
| Tue | Swim 2.5K (including 6×100m @ T-pace) |
| Wed | Bike 90 min (including 3×10 min @ FTP 92%) |
| Thu | Run 12K (including 6K @ Half Marathon Pace) |
| Fri | Swim 1.5K + easy 45-min bike |
| Sat | Brick: 90-min Z2 bike + 20-min run |
| Sun | Run 14K Z2 |
Total hours: approximately 9 hours.
Week -1 (Total hours from 9h → 5h, another 45% reduction)
| Day | Workout |
|---|---|
| Mon | Rest |
| Tue | Swim 1.5K (including 4×100m race pace) |
| Wed | Bike 60 min (including 3×6 min @ FTP 90%) |
| Thu | Run 6K (including 2K @ HM pace) |
| Fri | Swim 800m + easy 30-min bike |
| Sat | Leg opener: 20-min run including 4×100m strides |
| Sun | 70.3 Race Day |
Final Placement of Intensity Stimuli
- Swim race pace: 5 days pre-race
- Bike FTP intervals: 4 days pre-race
- Run HM pace: 3 days pre-race
- Brick workout: 8 days pre-race
Pace / Power Reference (Example: 4:45 finisher)
| Discipline | Target Pace / Power | Heart Rate |
|---|---|---|
| Swim | 1:50/100m | Z3 |
| Bike | FTP 75–80% | Z3 |
| Run | HM pace + 30 sec/km | Z3–Z4 |
Final 48-Hour Fine-Tuning
- 2 days pre-race: Swim 30 min + bike 30 min (no running)
- 1 day pre-race: Run 20 min including strides + 15-min bike equipment check
- Race morning: 5-min easy bike warm-up
Conclusion
The 70.3 is a touchstone for advanced triathletes. A 14-day taper with intensity retained allows your body to be fully ready without losing fitness—this is the sweet spot of the middle-distance taper.
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