Most triathlon cycling plans are written by triathlon coaches who are, first and foremost, runners. You can spot them instantly: short intervals, lots of sessions, no sustained work, and a weekly structure that treats the bike like a cross-training tool.
Roadman Cycling isn't a triathlon brand. We're a cycling brand that's talked to Alistair Brownlee, Olav Bu, Kristian Blummenfelt, Sebastian Kienle and Lionel Sanders alongside the fastest riders on the WorldTour. And every one of the triathletes says the same thing privately: the bike leg is where their race is won, and most age-groupers train it completely wrong.
Here's how to train the bike leg like a cyclist who happens to be racing a triathlon.
Why a Triathlon Bike Plan Is Not a Road Plan
A road cyclist trains for surges. Accelerations out of corners, bridges to the break, attacks on climbs, sprints at 1200W. Their sessions are built around repeatability — can you hit 350W eight times in an hour with 3 minutes rest?
A triathlete does none of that. The bike leg is a steady-state time trial with no drafting. The question isn't "how many times can you surge?" It's "what's the highest even number you can hold for 2:20?" That changes everything about how you train.
Four practical differences between a cycling-specialist triathlon plan and a generic road plan:
- Less VO2max work. Road cyclists live for 3-5 minute max efforts. Triathletes need them occasionally to raise the ceiling, but spending 20 per cent of your training there is wasted specificity.
- More sweet spot and threshold. Sustained work at 88-100 per cent FTP is the money zone for triathlon. It's below the fatigue cost of full threshold but high enough to force real adaptations.
- Longer sustained efforts. A road cyclist might do 3x15 at threshold. A triathlete benefits from 2x30 or even 1x60 at sub-threshold. Duration of individual efforts matters more than volume.
- Almost no sprint work. You will never sprint in a triathlon. Cut it.
The Weekly Structure
This is a build-phase week for an age-grouper training for a 70.3 or Ironman, cycling 8-10 hours per week. Scale the durations up or down to match your actual volume — the structure holds.
Monday — Full rest or 30 minute easy spin. Recovery is training. This is the day you don't compromise.
Tuesday — Key cycling quality session. This is the one that moves the needle. Rotate between three options across a 3-week cycle:
- 3x15 min at 95-100 per cent FTP, 5 min easy between
- 2x30 min at 88-92 per cent FTP (sweet spot), 8 min easy between
- 6x5 min at 105-110 per cent FTP, 4 min easy (VO2 once every 2-3 weeks)
Wednesday — Easy Zone 2, 60-90 min. Pure aerobic. If you can't hold a conversation, you're too hard. This day protects your Tuesday and Saturday.
Thursday — Brick or threshold, depending on race distance. For 70.3 and up: 75 min ride with 2x20 min at race power, straight into a 20 min run at target race pace. For Sprint/Olympic: 60 min ride with threshold blocks, 10 min run.
Friday — Rest or swim only. Keep the legs fresh.
Saturday — Long ride with race-specific work. 3-5 hours Zone 2 with 2x20-30 min at goal race power baked in mid-ride. This is where your pacing muscle memory gets built. Practice nutrition. Practice aero position.
Sunday — Brick run or long run off easy spin. Finish the weekly run volume.
That's two genuine cycling quality days, one brick, one long ride, and three easy or recovery days. Simple. Specific. It works.
Where Sweet Spot Earns Its Keep
If you only have two hard bike days a week, sweet spot is the highest-return intensity for a triathlete.
Sweet spot sits at 88-94 per cent FTP. It's hard enough to force FTP gains and muscular endurance adaptations, but low enough that you can do 60+ minutes of it in a single session without wrecking yourself for the rest of the week. For a 70.3 athlete racing at 75-82 per cent FTP, sweet spot is the perfect over-shoot — train slightly above race intensity, race feels manageable.
Compare that to full threshold work (98-102 per cent FTP). Great for raising FTP, but the fatigue cost is enormous. Do a genuine 3x20 at threshold on Tuesday and your run sessions for the next three days are compromised. For a pure cyclist that trade-off is fine. For a triathlete managing three sports, it's expensive.
A good build-phase split inside your weekly quality time: 60 per cent sweet spot, 30 per cent threshold, 10 per cent VO2.
Periodisation for Triathletes
A 16-week build to a key race in a cycling-specialist plan looks like this:
- Weeks 1-4 (Base): Volume, Zone 2 dominance, one VO2 session per week to raise the ceiling. Long rides grow by 15-30 min per week.
- Weeks 5-10 (Build): Sweet spot becomes the dominant intensity. Threshold work introduced. Long ride includes race-power blocks. One brick per week.
- Weeks 11-14 (Specific): Race-specific efforts at goal wattage. Long ride with race-duration pacing simulation. Brick intensity matches race.
- Weeks 15-16 (Taper): Volume drops 30-50 per cent, intensity stays. Short, sharp, and fresh.
Our cycling periodisation plan guide goes deeper on the underlying framework — it's written for road cyclists but the principles are identical; you just swap VO2 blocks for sweet spot blocks.
The Mistakes That Cost You Minutes
Riding every session in grey zone. Tempo rides that are too hard to be recovery and too easy to drive adaptation. You'll finish the block tired and no faster. Protect Zone 2. If you can't talk, slow down.
Doing bricks every weekend. Neuromuscular adaptation happens in 3-4 brick sessions total, not 16. After that, you're just adding fatigue. Swap bricks for a pure long ride most weeks.
No threshold testing. If you don't know your FTP zones, you're training by vibes. Test every 6-8 weeks using a 20-minute test or ramp test, then train off the actual number.
Copying a pro's plan. Blummenfelt can absorb 25-hour weeks with three key sessions because that's literally his job. Your plan has to fit around a 50-hour work week and actual recovery. Volume is earned, not prescribed.
Olav Bu put it best on the podcast: the training plan is a hypothesis, not a commandment. Measure what it does to you and adjust.
Key Takeaways
- A triathlon cycling plan needs less VO2max work and more sustained sweet spot and threshold than a road cyclist's plan.
- Build the week around two hard bike days (one threshold/sweet spot, one long ride with race-power blocks) and one brick.
- Sweet spot (88-94 per cent FTP) is the highest-return intensity for 70.3 and Ironman athletes.
- Keep most volume in genuine Zone 2 — grey-zone tempo is the silent killer of triathlete performance.
- Do one brick a week, not four. The adaptation is neuromuscular and caps out quickly.
- Periodise: base volume, build with sweet spot, specific race-pace blocks, then taper.
- Know your FTP zones and periodise the plan — training by vibes leaves minutes on the course.
- Want this built for you around your actual life? See our coaching options or apply to work with us.
- Building toward a 70.3? See the 70.3 bike training plan, how many bike hours per week for 70.3, and how to pace the bike in a half-Ironman
- Going long? Our 16-week Ironman bike plan and what wattage to ride in an Ironman cover the full-distance build and pacing
- For the bike-specific neuromuscular work, see brick workouts for Ironman and aero position training for triathletes
- Often-missed fundamentals: the bike leg of triathlon — why age-groupers get it wrong and triathlon cycling power-to-weight
- Winter months indoors? Indoor cycling for triathletes covers the off-season turbo block
- Picking a coach? Cycling coach vs triathlon coach explains where the disciplines diverge
- For the elite-side perspective on what 15+ years of triathlon endurance look like, see Alistair Brownlee's endurance lessons