Oxygenaddict Triathlon Podcast IRONMAN Taper Fatigue, Longest Training Ride for 70.3, Road Bike vs TT Bike & Best Tyre Choices: Ask Coach Rob | Ep 610
Sep 30, 2026
Coach Rob tackles taper fatigue, race-simulation timing, and the longest ride needed before a 70.3. He explores Ironman nutrition and avoiding gastrointestinal trouble, staying fit while traveling, and choosing between a road bike and TT bike. A beginner’s journey to an Ironman finish rounds out this practical Q&A.
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Episode notes
Move Race Simulation Earlier Before Travel
- Complete the race-simulation weekend three weeks before a 70.3 when travel prevents doing it two weeks out.
- Keep travel workouts under an hour and avoid trying to compensate for missed training before race day.
Race Simulations Rehearse Late-Race Fatigue
- A race simulation combines a long swim, Saturday bike-run brick, and Sunday long run across roughly 36 hours.
- The unusual fatigue helps athletes rehearse the physical and mental demands of an Ironman or 70.3 finish.
Check Bike Pacing Before Blaming Fuel
- Investigate bike pacing before blaming fueling for race-day gastrointestinal problems.
- Review power data; Coach Rob Willoughby says bike TSS above 280 often indicates pacing was too hard for digestion.