AI-built standard duathlon plan (10K-40K-5K)
12-14 weeks for standard duathlon distance: 10 km run + 40 km bike + 5 km run. EntrenAI structures run-heavy 45-48 % training, critical brick sessions, T1/T2 transitions and peaking. For intermediate duathlete with completed sprint.
Updated
What is a standard-distance duathlon plan?
The standard duathlon plan prepares for classic duathlon distance: 10 km run + 40 km bike + 5 km run = ~55 km total. Typical amateur time: 1:50-2:30 hours (elite: 1:35-1:50).
Differences vs sprint duathlon (5K-20K-2.5K) and long (15K-60K-7.5K):
- Distance 2× sprint: needs more aerobic resistance
- Run-heavy: 45-48 % of total time is running (vs 30-35 % in Olympic triathlon, 40 % in sprint duathlon)
- Unique structure: run → bike → run requires double leg adaptation
- Training volume: 8-12 h/wk (between Olympic tri 6-9 h and 70.3 tri 10-15 h)
Why standard duathlon is interesting:
- No swim = low technical barrier for runners and cyclists
- Challenging distance but recoverable in days, not weeks
- Total time 2 h (manageable in work schedule)
- Run-heavy lets runners stand out (vs triathlon where swim equalizes)
Plan based on:
- 80/20 polarization Seiler adjusted for multidiscipline
- Run-heavy distribution: 50 % volume running + 45 % bike + 5 % S&C
- Multiple brick sessions: run → bike (T1) and bike → run (T2)
- Transition specificity (T2 more critical — bike → 5K run with heavy legs)
Standard (10 km · 40 km · 5 km): how long each leg takes by level
The app estimates your total time from your real paces in each discipline and how long you take in transitions, and splits the plan's hours with it: the discipline where you lose most time is the one that trains most.
| Level | Run 1 | T1 | Bike | T2 | Run 2 | Total |
|---|---|---|---|---|---|---|
| Finish6:00/km · 25 km/h | 1:00:00 | 3:00 | 1:36:00 | 2:00 | 30:00 | 3:11:00 |
| Intermediate5:15/km · 30 km/h | 52:30 | 2:00 | 1:20:00 | 1:30 | 26:15 | 2:42:15 |
| Fast4:30/km · 35 km/h | 45:00 | 1:30 | 1:08:34 | 1:00 | 22:30 | 2:18:34 |
- Bike
- Run
- Transitions
Your AI-generated plan
1. Initial validation.
- Sprint duathlon completed (recommended, not strict)
- Base: sub-50 10K runner + comfortable 40km cyclist
- 12+ months multidiscipline experience or solid run/bike
- No recurring injuries
- 7 sessions/wk commitment, 8-12 h/wk peak
2. Typical weekly structure (7 sessions, 10 h/wk peak):
- Monday - Easy Z2 run (50-60 min)
- Tuesday - Bike sweet spot (75 min: 3×15 min @ 90 % FTP)
- Wednesday - Run intervals (60 min: 5×1000 m at 5K pace)
- Thursday - Z2 medium bike (90 min)
- Friday - Rest or 30 min S&C (core + glutes)
- Saturday - Long brick (run 30 min + bike 90 min + run 20 min)
- Sunday - Long run (90 min with target pace segment)
3. 4-phase periodization (14 wk):
Base (4 wk):
- Priority Z2 volume in running + bike
- 1 quality session/discipline/wk
- Long run 75 min, long bike 2 h
- Simple brick introduced wk 4 (run 20 + bike 60 + run 15)
Build (5 wk):
- Sustained 9-11 h/wk volume
- 2 quality sessions/discipline/wk
- Long run 90 min with target pace segments, long bike 2:30 h with sweet spot
- Race-pace brick wk 7+ (run 30 + bike 90 + run 25 at race pace)
Specific (3 wk):
- Maximum 11-12 h/wk volume
- Long brick 30 + 90 + 30 simulating race
- Practice T1/T2 multiple transitions
- Partial simulation: 7K + 30K + 3.5K wk 11
Tapering (2 wk):
- Reduced volume (-30 %, then -50 %)
- Maintain intensity (short fast intervals)
- Race day wk 14
4. Duathlon-specific brick sessions:
Race specific R-B-R brick:
- First run: 30 min Z2 + last 5 min race pace
- T1: 1-2 min transition (shoe change + helmet)
- Bike: 60-90 min Z2 with sweet spot segments
- T2: 30s-1 min (quick — bike to run)
- Second run: 20-30 min Z2 with last 10 min race pace
- Key learning: legs after bike for final 5K run
5. T1 (run → bike) and T2 (bike → run) transitions:
T1 (run → bike):
- Arrive at transition correctly (not too fast)
- Shoe change (race shoes → cycling shoes on bike if quick)
- Helmet MUST be on before touching bike (rule)
- Running mount (mount in motion if experienced)
- Target time: 1-1:30 min
T2 (bike → run):
- Running dismount (advanced technique)
- Cleat → running shoes change (quick if zip or elastic-laced shoes)
- Direct running exit
- Target time: 30-60 seconds
6. Standard duathlon fueling strategy:
- Pre-race (2-3h before): oats + banana + honey + coffee (~80 g carb)
- Pre-race (30 min): energy bar + water
- First run (10K, ~45-55 min): optional 1 gel pre-bike at T1
- Bike (40K, ~70-90 min): 1-2 gels + 1 bar + 750 ml liquid
- Second run (5K, ~22-30 min): 1 gel + station water
The transition, drawn: what you practise every two weeks
A 3-minute T1 is 2 minutes given away. The plan includes a transition session every two weeks with the bike on a real rack; this is the order you rehearse.
T1
- Enter transition easing off 20 m before
- Helmet BEFORE touching the bike
- Bike shoes on, or clipped to the pedals
- Run with the bike by the saddle to the mount line
T2
- Dismount before the line, never on it
- Rack the bike; helmet off ONLY afterwards
- Elastic laces: no sitting down
- The first 500 m slower than the body asks for
Who is this plan for?
- Intermediate duathlete with completed sprint wanting next level. 14-week plan.
- Amateur runner (10K, half marathon) wanting to add bike. 12-14-week plan (runner with strong running base).
- Road cyclist adding running. 14-16-week plan (cyclist with strong bike base).
- Non-swim triathlete (shoulder injury, water phobia) migrating to duathlon. 14-week plan.
Never done duathlon? Sprint duathlon plan first. Want longer distance? Long duathlon plan (15K-60K-7.5K, 16-20 wk).
Hours per discipline across the 12 weeks
From 6 to 10 hours a week, a deload every fourth week and a taper at the end. Run and bike are split according to their weight in the race and in your profile; "brick" marks the weeks with a bike + run session back to back.
- Bike
- Run
Your first weeks, in detail
Week 8
Advanced build — consolidated race-pace brick, intense bike sweet spot| Day | Session type | Detail | Duration |
|---|---|---|---|
| Monday - Easy Z2 run | Aerobic recovery | - 5 min walk - **55 min easy Z2** (5:30-5:45/km pace) - Natural cadence 175-180 spm | 60 min |
| Tuesday - Bike sweet spot 75 min | Z3 sweet spot | - **15 min warm-up** Z1 → Z2 - **3×15 min @ 90 % FTP (sweet spot)** with 5 min Z1 between - **15 min Z1 cool-down** | 75 min |
| Wednesday - Run intervals 60 min | Z4 VO2max | - **15 min Z2 warm-up** + drills - **5×1000 m at 5K pace (4:30/km)** with 200 m jog recovery - **10 min Z1 cool-down** | 60 min |
| Thursday - Z2 medium bike | Bike aerobic base | - **90 min Z2 (~70 % FTP)** - Varied cadence (85-95 RPM) - Aerobic base focus | 90 min |
| Friday - Rest or S&C | Recovery or light strength | Option A: 30 min S&C (squat, deadlift, plank, single leg) - maintenance. Option B: full rest. | 0-30 min |
| Saturday - LONG BRICK race-pace | Race simulation | **First run 30 min:** - 5 min Z1 warm-up - **20 min Z2** (5:00-5:15/km pace) - **5 min at target race pace (4:30/km)** — RPE 7 **T1 (90s transition):** - Practice efficient **Bike 90 min:** - 60 min Z2 (~70 % FTP) - **2×15 min @ 90 % FTP (sweet spot)** with 5 min Z2 between **T2 (60s transition):** - Quick bike → run change **Second run 25 min:** - 5 min Z1 (leg adaptation) - **15 min Z2 with last 10 min at race pace** (4:35-4:40/km) **Fueling**: 1 gel T1, 60 g carb during bike, 1 gel T2 | 150 min |
| Sunday - Long run with target pace segment | Z2 + Z3 segment | - **First 30 min easy Z2** (5:15-5:30/km) - **Middle: 25 min at target race pace (4:30-4:35/km)** — RPE 7 - **Last 35 min easy Z2** - Total: 90 min, ~17 km - Hydration every 5 km | 90 min |
These examples are real extracts from the EntrenAI planning engine. Your personal plan adjusts to your level, equipment and availability.
Equipment needed
EntrenAI automatically substitutes any exercise if you don’t have the gear.
- Road bike with gears + power meter
- UCI-approved helmet
- Cleats + cycling shoes (preferably no-laces compatible)
- Training running shoes + lighter race shoes (with zip or elastic laces for fast T2)
- Multisport GPS watch (Garmin Forerunner 945, COROS Pace, Suunto)
- Chest HR strap (Polar H10)
- Duathlon clothing (suit or trisuit)
- Bike bottle + soft flask + running belt
- Energy gels + bars
- Duathlon transition backpack
- Strava + Garmin Connect
What most people get wrong (and how to avoid it)
- 1
Skipping brick sessions
R-B-R brick is UNIQUE duathlon. Skipping = first race, T2 (bike → run) legs don't work. 1 brick/wk from wk 4 is MANDATORY.
- 2
Run dominant 100 % without bike
Although duathlon is run-heavy (45-48 %), bike is 35-40 %. Only train running + Z2 bike without sweet spot/intervals = poor race bike performance. Plan with 2 quality bike sessions/wk.
- 3
Too slow T2
T2 (bike → run) can save 1-2 min if practiced. Normal cleats + laced shoes = 60-90s. Elastic shoes + SPD cleats = 30-45s. Practice transition from wk 6.
- 4
Skipping Sunday long run
90-min long run with target pace segment builds SPECIFIC resistance for 10K + final 5K. Skipping = slower race run pace. It's most important Sunday session.
- 5
Volume rising >15 %/wk
7 sessions/wk plan is already high. Volume rise >15 %/wk = overload injury (knee, shin, IT band). Ideal rise 8-10 %/wk, deload every 4 wk.
Other Duathlon plan variants
Back to the general Duathlon plan
- AI-built sprint duathlon planTrain for a sprint duathlon (5K-20K-2.5K) in 12-14 weeks, with 45-48% of your training time on the run plus run-bike-run bricks. For runners who do not swim.
- AI-built beginner duathlon planFinish your first sprint duathlon (5K-20K-2.5K) in 14-16 weeks, peaking at 6-8 hours a week. No swimming is needed, so it suits both runners and cyclists.
Frequently asked questions
14 wk from sub-50 10K + consistent 40K cycling base. 16-18 wk if no cycling base (need to build before).
Typical amateur time: 2:00-2:30 h. Sub-2h: top 30-40 %. Sub-1:50: top 10-20 %. Sub-1:40: amateur elite. Pro elite: 1:35-1:50.
Road with aerobars (€100) sufficient amateur. TT bike saves 1-3 min on 40K bike, €3000-8000 investment. Decide by budget + ambition.
Pre-race: oats + banana + coffee (~120 g carb) 3h before. During: 60-80 g carb/h on bike, 1 gel pre-T2. Caffeine 200 mg pre-race.
Yes, long duathlon (15K-60K-7.5K) plan or pivot to Olympic triathlon (1.5K-40K-10K) are natural next steps. Long duathlon plan requires 16-20 wk, 12-15 h/wk peak.
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