IRONMAN 70.3 · Baku · Last raced 5 Sept 2026
How to train for IRONMAN 70.3 Baku
The organiser sums up the three legs in one word each. Swim, bay. Bike, flat. Run, flat. Read that and you pack for a fast day. Scroll further down the same page and you reach the historical weather for the race date, with a high of 31 C in 2025 and 34 C in 2023, and lows that never fell below 22 C. Baku is not a terrain problem. It is a heat problem sitting on top of a flat road, and flat road gives you nothing to slow you down.
The first edition, billed as the first IRONMAN race in the Caucasus, has been raced, and the organiser has not yet published the next date. The course and the weather record below are the ones they published for it.
By Kian Briel, founder. Analysed by engine 1, updated
What is actually on the road
The organiser's own course files, drawn the way the Event Analyzer draws a member's race.
- Swim1.94 km0 m upCourse file
- Bike90 km in 2 laps522 m upCourse file
- Run21.1 km132 m upCourse file
You swim one rectangular loop of 1.9 km off the beach at the Crescent Beach Hotel & Leisure Resort, in water the organiser describes as calm. You leave the water up the beach and follow a carpeted path to T1.
The bike covers 90 km in 2 laps, heading south out of the city through Baku's historic oil fields and industrial district, with marked turns every 10 km. The organiser puts the climbing under 383 m. Their file measures 522 m. The shape matters more than the total. Each loop opens with roughly 14 km of short rises and drops near the city, then settles into close to 30 km of flat road. The steepest rise on the whole leg is 481 m at 6.2 percent, at kilometre 55.
The run is 21.1 km in 2.5 laps of the Caspian waterfront, out and back between turnaround points at the northern and southern ends, past the race village and along the Caspian promenade to a finish near Government House. The organiser says less than 40 m of climbing. The file reads 132 m, spread so thin that the engine treats 94 percent of the leg as one flat segment.
Course shape by distance
- Flat 92%
- Climbing 4%
- Descending 5%
The longest stretches
- Bike, flat29 km30% of the bike
- Bike, climbing0.48 km2% of the bike
- Run, flat19.8 km94% of the run
Each row is one unbroken stretch of the course that keeps the same shape the whole way. The number is how much of that leg you spend inside it, and it comes out the same whether you are fast or slow.
What this course asks of each leg
Twelve training dimensions scored for each leg against its own course, the way the Event Analyzer scores a member's race.
Heat tolerance before anything else. Environmental resilience scores 90 on every leg of this course, above aerobic endurance at 85. Muscular endurance comes next at 80 to 82, then threshold capacity at 70. None of that is exotic. It is the ordinary half-distance profile, with the thermostat turned up.
The bike carries one extra note. High-intensity capacity reads 55 there against 42 on the run, and strength and force reads 45 against 35. Those are the city sections: ten short rises across the two loops, each over in a minute or three, none of them long enough to call a climb in the mountain sense. Ask the engine for a bike session from this file and it builds ten one-minute efforts in Zone 5, each followed by more than eight minutes of easy spinning. The honest reading of that session is that the rises are sparse and brief. They are punctuation, not the sentence.
Now the bands. A Trained athlete swims 38:59, rides 3:03:09 at 182 W and runs 1:59:15, for a day of 5:51:23. The bike is 52 percent of that. The Competitive band finishes in 5:07:03 from 4.15 W/kg at 75 kg and 4:20 /km threshold pace, about 21 minutes quicker on the bike and 18 on the run. Most of those minutes are made on straight road, not on the rises.
- Environmental resilience90
- Aerobic endurance85
- Muscular endurance80
- Threshold capacity70
- Aerobic durability65
- Technical skill65
- Threshold durability65
- Fueling resilience55
- High-intensity capacity40
- Anaerobic capacity25
- Strength / force20
- Sprint power5
Nymiva reads what you can already show, from your own data
Connect your training history and the Focus Lab scores the same twelve dimensions this course demands against where you sit today. The gap between the two is what you train.
- MeasuredFrom your thresholds and testsThreshold power, threshold pace, critical swim speed and field tests you have done. The dimensions they can carry are scored directly.
- EstimatedFrom your training historyConnected activities are read for what they prove: long efforts, late-session fade, repeated hard work, fueling on long days. Each score says how it was read.
- ProxyFrom a stand-in, and named as oneWhere only an indirect signal exists, the score carries the proxy it came from and a lower confidence, never a number dressed as a measurement.
- UnmeasuredHonestly blankA dimension nothing in your data can answer stays unmeasured. It is never a zero, and the plan does not pretend to know it.
Every dimension ends in one word
- Develop the course asks more than you can show
- Maintain close enough to hold at the minimum dose
- Covered nothing to build here
- Unmeasured the course needs it, your data cannot say yet
Every course on Nymiva is read against twelve dimensions, and so is every athlete. The course side comes from the organiser's file and the race environment. The athlete side comes from thresholds and connected training history, each score marked with what it was read from and how much weight it can bear. Where the course asks for more than the athlete has shown, that difference is a gap. The gap is then scaled by how much of the race day it fills, which on this course means the bike and the heat.
This page knows nothing about you. Its season therefore takes the plain assumption that your gaps sit where Baku's demands are largest, and lays out 24 weeks across 5 developmental blocks and a two-week taper. Aerobic endurance leads the first block in all three sports. Durability leads the second, threshold capacity the third, muscular endurance the fourth, and aerobic endurance returns to lead the last block before the taper. Your own season is drawn from your numbers, and where it disagrees with this one, trust yours.
Train the bike to protect the run
Which demands matter most across the whole race. A leg's demand counts for as much of the day as that leg takes, so a score of 85 on the bike outweighs the same score on the swim.
- 01Environmental resilienceBike leg, 52% of the day90 × 52%47
- 02Aerobic enduranceBike leg, 52% of the day85 × 52%44
- 03Muscular enduranceBike leg, 52% of the day81 × 52%42
The bike takes 52% of the Trained reference band’s day, so its demands carry the most race weight. What the bike leaves in the legs is what the run gets.
Which demand gets a block, and when
The engine freezes one lead focus per sport on every developmental block, holds the rest at maintenance, and verifies before it reprioritises.
An illustration, not your plan. This page has none of your data, so the season below is the engine’s answer to one stated assumption: that your gaps line up with what IRONMAN 70.3 Baku demands. Your own season is built from your history, your thresholds, the days you can train and the races you have entered, and it will differ from this in its priorities, its sessions and its load.
- 01Run muscular endurance, a practice block4 weeks
- 02Run aerobic endurance, a development block4 weeks
- 03Bike muscular endurance, a practice block4 weeks
- 04Bike aerobic endurance, a development block4 weeks
In the order the allocator places them, general first, most race-like last.
- Week 1PrepPrep
A lead-in week. It develops nothing by design.
- Weeks 2 to 5Foundation 1Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportRun muscular endurance
- SupportBike muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun threshold durability
- SupportSwim aerobic durability
- Weeks 6 to 9Foundation 2Closes with a recovery week
- PriorityBike aerobic durability
- PriorityRun threshold durability
- PrioritySwim aerobic durability
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportRun muscular endurance
- SupportBike muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- Weeks 10 to 13Foundation 3Closes with a recovery week
- PriorityBike threshold capacity
- PriorityRun threshold capacity
- PrioritySwim threshold capacity
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportRun muscular endurance
- SupportBike muscular endurance
- SupportSwim muscular endurance
- SupportBike aerobic durability
- SupportRun threshold durability
- SupportSwim aerobic durability
- Weeks 14 to 17Event shaping 1Closes with a recovery week
- PriorityRun muscular endurance
- PriorityBike muscular endurance
- PrioritySwim muscular endurance
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun threshold durability
- SupportSwim aerobic durability
- Weeks 18 to 21Event shaping 2Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportRun muscular endurance
- SupportBike muscular endurance
- SupportSwim muscular endurance
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun threshold durability
- SupportSwim aerobic durability
- Weeks 22 to 23PeakPeak
The taper. Load comes down toward the race, content stays specific.
- Week 24RaceRace
Race week.
Held at maintenance between blocks
- Runmuscular endurance, aerobic endurance, aerobic durability, threshold capacity, threshold durability
- Bikemuscular endurance, aerobic endurance, aerobic durability, threshold capacity, threshold durability
- Swimaerobic endurance, aerobic durability, threshold capacity, threshold durability, muscular endurance, technical skill
Touches scheduled by each capability’s own decay, at a fraction of its development dose, so earlier work is still there on race day.
The sessions the blocks are built from
One entry per kind of work the block trains, at the intensity that work is meant to be done at. Where the same work runs at several lengths, the entry shows the span it grows across rather than one entry per length.
- Foundation 1 · Weeks 2 to 575 to 240 min
150 to 210 min at Zone 2
BikePower, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 540 to 270 min
180 to 210 min at Zone 3, then 30 min at Zone 4
BikePower, Zone 3Trains aerobic capacity - Foundation 1 · Weeks 2 to 535 to 120 min
90 min at Zone 2
RunPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 550 min
4 x 1.5 min at Zone 3, 6 min easy between
RunHeart rate, Zone 3Trains aerobic capacity - Foundation 1 · Weeks 2 to 545 to 51 min
4 x 8 min at Zone 2, 1 min easy between
SwimPace, Zone 2Trains aerobic capacity - Foundation 1 · Weeks 2 to 547 to 81 min
3 x 1000 m at Zone 3, 0.3 min easy between
SwimPace, Zone 3Trains aerobic capacity
10× course-matched climbs
1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, then 1 min at Zone 5, 8.3 min easy between
Compiled by the deterministic course compiler from the organiser’s file: the course’s one repeatable requirement, rehearsed at a dose the progression allows.
- Bike
- 109 min
- Trains anaerobic capacity
- Supports strength force
- Supports muscular endurance
24 weeks, laid out backwards from race day
The shortest runway Nymiva builds for this event type, with its blocks, recovery weeks, taper and race week in place.
- 1
- 2
- 3
- 4
- 5
- 6
- 7
- 8
- 9
- 10
- 11
- 12
- 13
- 14
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- 18
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- 22
- 23
- 24
- Prep
- Foundation
- Event shaping
- Peak
- Race
- Recovery week
Your own season carries these same phases on your own dates, with the load solved from your fitness and the days you can train, and it changes when your data does.
What each level does on the day
Reference finish times per peer band, the pacing plan the model holds each band to, and where the day is decided.
| Band | Swim | Bike | Run | Finish |
|---|---|---|---|---|
| Recreational2:11 /100m critical swim speed · 2.47 W/kg at 75 kg · 6:08 /km threshold pace | 0:46:01 | 3:18:48 | 2:23:24 | 6:38:13 |
| Trained1:51 /100m critical swim speed · 3.03 W/kg at 75 kg · 5:06 /km threshold pace | 0:38:59 | 3:03:09 | 1:59:15 | 5:51:23 |
| Competitive1:36 /100m critical swim speed · 4.15 W/kg at 75 kg · 4:20 /km threshold pace | 0:33:43 | 2:42:01 | 1:41:19 | 5:07:03 |
| Elite1:26 /100m critical swim speed · 5.27 W/kg at 75 kg · 3:50 /km threshold pace | 0:30:13 | 2:27:58 | 1:29:38 | 4:37:49 |
Pacing plan
- 0 km0.9%26.5 km/h3:42
- 1.63 km3.1%17.7 km/h1:33
- 2.09 km2.8%18.7 km/h1:15
- 2.48 km-4.9%53.7 km/h0:59
- 3.35 km0.9%26.5 km/h4:27
- 5.32 km-4.5%52 km/h0:20
- 5.61 km0%30.8 km/h1:41
- 6.47 km4.2%14.6 km/h1:21
38 more segments in the full plan.
- Run: reach 4:20 /km and this course gives back 44:20.
Where it is decided
Out on the flat, on the road away from the city.
The first of the two flat stretches takes 30 percent of the bike leg on its own, and the one on the second loop takes nearly as much again. There is no gradient to meter the effort against and the city is behind you. A rider who holds 182 W here gets off the bike with a run left. A rider who drifts above it because the road feels free will not know until the waterfront.
That is where the bill arrives. For a Trained athlete the run begins nearly four hours after the swim start, on a promenade with no hill to excuse slowing down. The 1:59:15 in the Trained band assumes a runner who reached T2 with something left. The same runner who spent it on the open road will walk sections of a course with nothing on it to walk.
Getting it wrong
Trusting the word flat is the first mistake. Riders see it on the course page, set a target from a time trial ridden on a cool morning at home, and hold it through the heat the organiser's record shows. The number was right at home. It is wrong here.
The second is the city rises. There are ten of them, the steepest is 6.2 percent, and each is over quickly enough that a surge feels free. The steepest takes 1.6 percent of the bike leg. Standing on the pedals up every one of them buys a few seconds and costs minutes on the waterfront.
The third is the first lap of the run. The race village and the Caspian promenade are loud, the turnarounds bring the whole field past you, and the pace that feels easy in the first kilometres is the pace of a runner who has not yet felt the heat. Two laps later it will be obvious. By then it is too late to fix.
Conditions on the day
- 2025high 31 C, low 24 C
- 2024high 29 C, low 23 C
- 2023high 34 C, low 22 C
From the organiser’s own records. Not a forecast.
Every session is a claim, every block is a test
A plan is not a calendar. Each key session states what it trains and how that is checked, and each block ends with a public verdict before the next one is chosen.
What a block promises
Bike aerobic endurance moves from your baseline to a stated target by the end of Foundation 1
- The baseline is your measured score when the block starts. The target is the score the model predicts for it.
- Verified at the block’s recovery week, by a field test or a refresh of the supply read from your history.
- Confidence rises by agreement between independent signals, never by one metric crossing a line.
- A block that misses its target is a public miss. The next block is chosen from what was proven, not from what was planned.
- 01Stimulus achievedThe work landed in the zone the session named, for the dose it named.
- 02Partially achievedSome of the work landed. The session banks what it can prove.
- 03Not achievedThe load may have been there. The stimulus was not, so nothing is banked.
- 04Data insufficientNo usable stream. The session is neither credited nor blamed.
- Session verified
- Progression banked
- Block verified
- Priority reassessed
- Plan adapted
Your numbers, this course
Analyze IRONMAN 70.3 Baku against my fitness
The same simulation and the same Focus Lab read, on your thresholds instead of a band’s. Three numbers give a finish estimate and a partial read. A connected history gives the whole table.
The first 14 days are free.
- Trained band finish
- 5:51:23
- Of the day on the bike
- 52%
- Dimensions scored per leg
- 12
- Season runway shown
- 24 wk
Questions people ask
- How hilly is the IRONMAN 70.3 Baku bike course?
- The organiser calls the two-loop 90 km course flat and puts its climbing under 383 m. The file they publish measures 522 m, almost all of it in short rises near the city, the steepest 481 m at 6.2 percent. Two long flat stretches fill more than half of the leg.
- How hot is IRONMAN 70.3 Baku?
- The organiser's historical weather for the race date shows highs between 29 C and 34 C from 2023 to 2025, and no low below 22 C. The demand model scores environmental resilience at 90 on every leg, higher than any other dimension on the course.
- Is the IRONMAN 70.3 Baku run course flat?
- Yes. It is 2.5 laps of the Caspian waterfront between two turnaround points, and the organiser puts it under 40 m of climbing. The engine reads 94 percent of the run leg as a single flat segment.
- How long is the season on this page?
- The illustrative season runs 24 weeks, with five developmental blocks and a two-week taper. It is built from the course alone. A member's own season starts from their numbers and can run longer.
Course data from the organiser’s published files, analysed 25 Sept 2026 by engine 1, demand model 4. Reference times are simulated for a peer band at a stated reference athlete and are not a prediction for anyone. Nothing on this page is medical advice.
IRONMAN® and IRONMAN 70.3® are registered trademarks, and 5150 is a trademark, of World Triathlon Corporation. Nymiva is an independent training platform and is not affiliated with, sponsored by or endorsed by World Triathlon Corporation. Course data is read from the organiser’s public course pages for the purpose of describing the event.