IRONMAN 70.3 · Belek · 1 Nov 2026
How to train for IRONMAN 70.3 Türkiye
Belek sells itself as the fast one. The organiser calls it fast and flat, ideal for first-timers and personal bests, and the file agrees without reservation: every metre of all three legs reads as flat. People take that as permission to worry less. It is the opposite. A course with no hills takes away every cue that tells you to ease off, and the athlete who arrives at the run in good shape is the one who paced 90.2 km of level road with nothing but their own judgement.
The next edition is on 2026-11-01. A Trained athlete finishes it in 5:44:47, and more than half of that is spent on the bike.
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.
- Swim1.93 km in 2 laps0 m upCourse file
- Bike90.2 km in 2 laps121 m upCourse file
- Run21.2 km in 3 laps26 m upCourse file
The swim is 1.9 km in the clear water of the Turkish Riviera, two loops split by an Australian Exit, so you leave the water halfway and go back in. The organiser recorded it at 23 C in 2025, 27 C in 2024 and 24 C in 2023.
The bike heads towards the Expo 2016 area on multi-lane roads. It is two laps of a 35k loop with a short distance in and out, 90.2 km in total. The organiser puts the gain at about 80 m and says the only climbs are over bridges. The file measures 121 m, and the engine reads the leg as one flat segment from start to finish. The organiser also asks riders to keep right so faster athletes can pass.
The run starts inside The Land of Legends, in the shopping part, and follows the Venetian Channel past cafes, cheering spots, the finish line and the expo. From there it runs out along the Kadriye main road on smooth asphalt to a turnaround at the Red Bull Energy Station, comes back past the Kingdom Hotel and reaches transition for the next lap. You pass the finish line three times. About 1000m into the fourth lap you turn sharply left into the finish chute. The file measures 26 m of gain over 21.2 km.
Course shape by distance
- Flat 100%
- Climbing 0%
- Descending 0%
The longest stretches
- Bike, flat90.2 km100% of the bike
- Run, flat0.11 km1% of the run
- Run, flat21.1 km100% 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.
Aerobic endurance, then muscular endurance, and nothing that rewards a big engine for short efforts. The demand model scores the bike at 85 and 80 for those two, then threshold capacity at 70, with aerobic durability and threshold durability level at 65. The bike is 51 percent of a Trained athlete's day, so the five biggest demands on the course are all on the bike. The run and the swim each read 85 and 80 for their own pair.
The low scores tell the story as clearly as the high ones. High-intensity capacity reads 40 on every leg. Strength and force read 35 on the bike and 30 on the run. There is nothing here to climb and nothing to surge for, and the engine says so when it turns the bike into a session. It does not return intervals at all. It returns one unbroken hour at Zone 4 with the power line held flat, which is as close as a training day gets to what this bike asks of you.
The swim is the exception to all that flatness. Technical skill scores 79 in the water, against 51 on the run and 36 on the bike. Two loops with an exit from the water in the middle make this a swim of rhythm broken and rebuilt, not one long straight line.
Look at what separates the bands. A Trained athlete swims 38:49, rides 2:55:55 at 182 W and runs 2:00:03. The Competitive band, on 4.15 W/kg at 75 kg and 4:20 /km threshold pace, finishes in 5:01:11. It gains 20 minutes on the bike and 18 on the run, and on a course this flat every second of it comes from a higher steady number, held.
The organiser promises mild autumn temperatures, and environmental resilience scores 10 on every leg. The weather is not the problem in Belek. The pacing is.
- Aerobic endurance85
- Muscular endurance80
- Technical skill79
- Threshold capacity70
- Aerobic durability65
- Threshold durability65
- Fueling resilience55
- High-intensity capacity40
- Anaerobic capacity25
- Strength / force20
- Environmental resilience15
- 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
In every Nymiva season the first step is a comparison. The course is scored on twelve dimensions from its file. You are scored on the same twelve from your thresholds and your connected training history, and each of your scores records what it rests on and how sure it is. A gap is where the course asks for more than you can show, weighted by how much of the race it fills. On a flat course that weighting leans hard towards steady aerobic work on the bike.
There is no reader data behind this page. So the season it shows starts from the plainest assumption, that your gaps sit where the demands are highest, and runs 24 weeks across 5 developmental blocks and a two-week taper. Aerobic endurance leads the first block in every sport. The second block puts threshold capacity first in the water and aerobic durability first on the bike and the run. In the third, technical skill leads the swim while threshold capacity leads on land. Muscular endurance takes the fourth, and aerobic endurance leads once more before the taper. A season built from your numbers will set different priorities.
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.
- 01Aerobic enduranceBike leg, 51% of the day85 × 51%43
- 02Muscular enduranceBike leg, 51% of the day80 × 51%41
- 03Threshold capacityBike leg, 51% of the day70 × 51%36
The bike takes 51% 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 Türkiye 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
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim technical skill
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- Weeks 6 to 9Foundation 2Closes with a recovery week
- PrioritySwim threshold capacity
- PriorityBike aerobic durability
- PriorityRun aerobic durability
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim technical skill
- SupportBike threshold capacity
- SupportRun threshold capacity
- Weeks 10 to 13Foundation 3Closes with a recovery week
- PrioritySwim technical skill
- PriorityBike threshold capacity
- PriorityRun threshold capacity
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- Weeks 14 to 17Event shaping 1Closes with a recovery week
- PriorityBike muscular endurance
- PriorityRun muscular endurance
- PrioritySwim muscular endurance
- SupportBike aerobic endurance
- SupportRun aerobic endurance
- SupportSwim aerobic endurance
- SupportSwim technical skill
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun aerobic durability
- Weeks 18 to 21Event shaping 2Closes with a recovery week
- PriorityBike aerobic endurance
- PriorityRun aerobic endurance
- PrioritySwim aerobic endurance
- SupportBike muscular endurance
- SupportRun muscular endurance
- SupportSwim muscular endurance
- SupportSwim technical skill
- SupportBike threshold capacity
- SupportRun threshold capacity
- SupportSwim threshold capacity
- SupportBike aerobic durability
- SupportRun 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
Sustained course race pressure
60 min at Zone 4
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
- 85 min
- Trains threshold durability
- Supports aerobic durability
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
- 15
- 16
- 17
- 18
- 19
- 20
- 21
- 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 | 0:45:48 | 3:10:57 | 2:24:23 | 6:31:08 |
| Trained1:51 /100m critical swim speed · 3.03 W/kg at 75 kg · 5:06 /km threshold pace | 0:38:49 | 2:55:55 | 2:00:03 | 5:44:47 |
| Competitive1:36 /100m critical swim speed · 4.15 W/kg at 75 kg · 4:20 /km threshold pace | 0:33:34 | 2:35:37 | 1:42:00 | 5:01:11 |
| Elite1:26 /100m critical swim speed · 5.27 W/kg at 75 kg · 3:50 /km threshold pace | 0:30:04 | 2:22:07 | 1:30:14 | 4:32:25 |
Pacing plan
- 0 km0%30.8 km/h2:55:43
- Run: reach 4:20 /km and this course gives back 43:36.
Where it is decided
On the second lap of the bike.
The first lap of the 35k loop is easy to ride well. You are fresh and the multi-lane roads are wide. The second lap is where the flat starts to bite. Nothing about the road has changed, there is still no hill to tell you to sit up, and the only climbs are the bridges. What has changed is your legs. A Trained rider holding 182 W for 2:55:55 has no terrain to vary the load. Every minute is the same minute, and the rider who went out too hard on the first lap has to give it back on the second, when it costs most.
Then the run, which the engine reads as one flat segment covering all but a sliver of the leg. Three laps along the Venetian Channel and out to the Red Bull Energy Station, past the same cafes and the same cheering spots each time. It starts about three and three quarter hours into a Trained athlete's day. It gives you nothing to recover on, and it tells you exactly how you rode.
Getting it wrong
The swim goes wrong at the Australian Exit. Swimmers come out of the first loop, treat the second entry as a fresh start and go back in too hard. The second loop then costs more than the first, on a leg that scores technical skill higher than anywhere else on the course.
The bike goes wrong in training more than on the day. Riders read flat and prepare with short, hard intervals because the race sounds fast. The course asks for the opposite: long, steady hours at a number you can hold without thinking about it.
The run goes wrong at the finish line, the first three times you pass it. The noise of The Land of Legends pulls the pace up on every lap, and the fourth lap is only about 1000m long before the chute. Save the push for that last kilometre.
Conditions on the day
- 2025water 23 C
- 2024water 27 C
- 2023water 24 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 Türkiye 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
- 5:44:47
- Of the day on the bike
- 51%
- Dimensions scored per leg
- 12
- Season runway shown
- 24 wk
Questions people ask
- Is the IRONMAN 70.3 Türkiye bike course flat?
- Yes. The organiser puts the total gain at about 80 m and says the only climbs are over bridges. The file measures 121 m over 90.2 km, and the engine reads the whole leg as a single flat segment. It is two laps of a 35k loop towards the Expo 2016 area, plus a short distance in and out.
- What is the water temperature for the swim in Belek?
- The organiser records 23 C in 2025, 27 C in 2024 and 24 C in 2023. The swim is two loops in the Turkish Riviera, split by an Australian Exit. The course page does not state a wetsuit rule, so check the athlete guide.
- How many laps is the IRONMAN 70.3 Türkiye run?
- Three full laps and the start of a fourth. You pass the finish line three times, and about 1000m into the fourth lap you turn left into the finish chute at The Land of Legends. The file measures 26 m of gain over 21.2 km.
- 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 season starts from their own numbers and can be 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.