Duathlon Plan

AI-built beginner duathlon plan

Q: How long to prepare first duathlon?

14-16 wk from minimum base (comfortable 5K running + 20K bike). 20-24 wk from 0 (no running or bike). Plan is adapted for beginner with initial base.

Q: Beginner first duathlon time?

Beginner sprint duathlon : 1:30-2:30 h. Sub-1:30 : fast for beginner. 2:00-2:30 : normal complete. Your first goal is to FINISH healthy, not speed.

Q: Do I need road or gravel bike?

Any bike with gears works for first duathlon. Hybrid, gravel, basic road bikes are perfect. No TT bike needed or carbon road — that's for later. Helmet mandatory, rest optional.

14-16 weeks to complete your first sprint duathlon (5 km run + 20 km bike + 2.5 km run). EntrenAI structures gradual progression from 0 multidiscipline, initial brick sessions, simple transitions. For runner or cyclist starting in duathlon.

Updated September 14, 2026

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100+ athletes

thousands of plans generated

What is a beginner duathlon plan?

The beginner duathlon plan is designed for someone who has never completed a duathlon and wants to finish their first event. Target distance: sprint duathlon = 5 km run + 20 km bike + 2.5 km run (~27.5 km total, ~1:30-2 h amateur time).

Why duathlon is ideal to start multidiscipline:

No swim = no major technical/equipment barrier (vs triathlon requires wetsuit + swim technique)
Familiar to runners and cyclists: do 5K running + 20 km bike? You already have base
Minimum equipment: bike (any) + shoes + helmet (no fins, goggles, swimsuit needed)
Accessible events: popular duathlons in small Spanish towns, cheap €15-30 entry

Plan structures to complete, not compete:

Fundamental focus: finish event without injury
Gradual progressive volume: starts 4 h/wk, peaks 8 h/wk
Conservative pace: 80 % Z2, no heavy intervals
Simple brick: 1 brick/wk from wk 6 (run + short bike + short run)
Basic transitions: practice 1× during plan, no elaborate T1/T2

Differences vs standard duathlon plan:

Volume 50 % lower (6 h/wk vs 10 h/wk)
No VO2max intervals or intense sweet spot
Simple brick without race-pace
Sprint target distance, not standard

Your first sprint (5 km · 20 km · 2.5 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	30:00	3:00	48:00	2:00	15:00	1:38:00
Intermediate5:15/km · 30 km/h	26:15	2:00	40:00	1:30	13:08	1:22:53
Fast4:30/km · 35 km/h	22:30	1:30	34:17	1:00	11:15	1:10:32

Bike
Run
Transitions

How the plan works

Your AI-generated plan

1. Initial validation.

Capacity: comfortably run 5 km or do 20 km bike (at least one of two)
No active injuries
Bike access (any road or gravel bike)
Running space (streets, park, beach)
Cardiovascular health without restrictions
5 sessions/wk commitment, 60-90 min each

Don't run 5 km or do 20 km bike? 5K running or beginner cycling plan first (3-4 months), then beginner duathlon.

2. Typical weekly structure (5 sessions, 6 h/wk peak):

Monday - Easy Z2 run (40-50 min)
Tuesday - Z2 bike (60-75 min)
Wednesday - Rest or 30 min walk
Thursday - Z2 run + pickups (45 min: Z2 + 4×30s easy sprint)
Saturday - Long bike (75-120 min Z2)
Sunday - Rest or simple brick (wk 6+: run 20 + bike 30 + run 10)

3. 4-phase periodization (14 wk):

Base (4 wk):

Easy consolidated Z2 volume (4-5 h/wk)
1 run + 1 bike session/wk
Long run 30-40 min, long bike 60 min
No brick yet — initial run/bike adaptation
Wk 4: walk/run 5 km test, pedal 20 km test (verify capacity)

Build (5 wk):

5-7 h/wk volume
2 run + 2 bike sessions/wk
Long bike 90-120 min Z2
Simple brick wk 6: run 20 min + bike 30 min + run 10 min (HOME or predictable route)
Practice simple transition wk 8 (quick shoe change + helmet + bike mount)

Specific (3 wk):

6-8 h/wk volume
Race-distance simulated brick: run 5K + bike 20K + run 2.5K (wk 11 or 12)
More structured bike: 1 session with Z3 segments (sweet spot)
Run with 1 pickup session/wk (4×400m at target pace)

Tapering (2 wk):

Reduced volume (-30 %, then -50 %)
Race day wk 14

4. Simple brick (CRITICAL wk 6+):

Simple beginner brick:

First run 20 min Z2 (conversational pace, ~6:00-6:30/km)
Transition 2-3 min (shoe change + helmet + bike mount, no pressure)
Bike 30 min Z2 (normal pace, 60-65 % estimated FTP)
Transition 1-2 min (bike → run)
Second run 10 min Z2 (slightly slower pace from fatigue)
Main learning: legs feel "weird" after bike → run. This is NORMAL and improves with practice.

5. Basic transitions (race day):

T1 (run → bike):

Arrive at transition without despair
Shoe change (race shoes → cycling shoes, or same if very beginner use normal cleats)
Helmet before touching bike (mandatory rule)
Walking exit, mount in designated zone
Acceptable beginner time: 2-3 min (no problem)

T2 (bike → run):

Controlled dismount (not in motion if beginner)
Cleats → running shoes change (laces OK, no need for elastics)
Walking exit, then running
Acceptable beginner time: 1-2 min

6. Beginner race day strategy:

Pre-race:

Arrival 60 min before (don't stress)
Oats + banana + water 3h before
Energy bar 30 min pre-race
Light warm-up 10 min jog + 5 min easy bike
Visit transition 2-3 times to memorize

During race:

First run 5K: conservative pace (slower than your standalone 5K PB)
T1: relax, don't accelerate, everyone goes through transition
Bike 20K: conversational pace, hydrate every 10 min
T2: relax, heavy legs are normal
Final run 2.5K: hardest moment mentally. Find someone ahead and try not to lose sight
Cross finish: celebrate!

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.

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

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?

Amateur runner with 5K-10K in CV wanting to add bike. 14-week plan build cycling + brick.
Road cyclist with comfortable 20-40 km wanting to add running. 14-week plan build running + brick.
Person who saw duathlon on TV or from friend and found it interesting. 16-week plan (4 extra wk to build initial base).
Gym athlete wanting to expand to outdoor. 16-week plan from gym to first duathlon.

Never run 5K or done 20 km bike? 5K running + beginner cycling plan first. Want longer distance? Standard duathlon plan (next level).

Hours per discipline across the 10 weeks

From 4 to 7 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

Sample plan

Your first weeks, in detail

Week 8

Advanced build — first consolidated simple brick, build endurance

Day	Session type	Detail	Duration
Monday - Easy Z2 run	Aerobic recovery	- 5 min walk - 45 min easy Z2 (5:30-6:00/km pace, conversational) - Focus posture + calm breathing	50 min
Tuesday - Z2 medium bike	Bike aerobic	- 75 min Z2 (~65-70 % estimated FTP) - Natural cadence (75-85 RPM amateur) - Aerobic base focus	75 min
Wednesday - Rest or walk	Recovery	Option A: 30 min easy walk (active recovery). Option B: full rest.	0-30 min
Thursday - Z2 run + pickups	Z2 + 4×30s pickups	- 10 min Z2 warm-up - 30 min Z2 (normal pace) - 4×30s pickups (no max sprint, ~10K race pace) with 90s recovery - 5 min cool-down	50 min
Friday - Rest	Recovery	Full rest.	0 min
Saturday - Long bike	Long Z2 ride	- 2 hours Z2 (~65 % FTP, conversational pace) - Hydration every 30 min - Light food during if hungry (banana, bar) - Focus endurance + aerobic flow	120 min
Sunday - Simple brick	Run + bike + run brick	First run 20 min: - 5 min Z1 warm-up - 15 min Z2 (normal pace) T1 (3 min, no pressure): - Shoe change + helmet + mount bike Bike 30 min Z2: - 30 min Z2 (normal pace) T2 (2 min, no pressure): - Bike → running shoes → walk first then run Second run 10 min Z2: - 5 min Z1 (leg adaptation) - 5 min Z2 (slightly slower pace) Fueling: 1 bar pre-brick + water during	70 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 or gravel bike (any bike with gears)
UCI-approved or similar helmet
Cleats + cycling shoes (optional, flat pedals OK beginner)
Comfortable running shoes (no need for race lighter yet)
GPS watch or phone with running app (Strava, Garmin Connect)
Chest HR strap (Polar H10) optional but useful
Comfortable running + cycling clothes (no trisuit yet)
Bike bottle + running water if needed
Small backpack or bag for transition
Protective helmet (mandatory)

Common mistakes

What most people get wrong (and how to avoid it)

1
Starting plan without minimum base
Don't comfortably run 5 km or do 20 km bike? Beginner duathlon plan is NOT for you. Start with **5K running** or **beginner cycling** plan first (3-4 months), then beginner duathlon.
2
Skipping first brick by nerves
First brick (wk 6) is CRITICAL — without it, race day first brick will be very tough. Simple brick at home or known route, no time pressure. After 1-2 bricks, transition legs improve dramatically.
3
Wanting to go fast in plan
Beginner plan is to COMPLETE, not compete. Conservative 80 % Z2 pace is goal. Wanting to go fast = injury + race day fatigue. Finish race comfortably, then if you want to perform, **standard duathlon** plan.
4
Unnecessary elaborate equipment
Beginner does NOT need TT bike, trisuit, advanced cleats. Basic road bike + running shoes + helmet + comfortable clothes is enough. Elaborate equipment investment AFTER 1-2 duathlons, when you confirm you like it.
5
Changing plan in last 4 wk
Wk 11-14 is tapering + race. Drastic changes (more volume, more intensity, new techniques) in last 4 wk = injury or race underperformance. Trust plan, maintain consistency.

Other Duathlon plan variants

Back to the general Duathlon plan

Frequently asked questions

14-16 wk from minimum base (comfortable 5K running + 20K bike). 20-24 wk from 0 (no running or bike). Plan is adapted for beginner with initial base.

Beginner sprint duathlon: 1:30-2:30 h. Sub-1:30: fast for beginner. 2:00-2:30: normal complete. Your first goal is to FINISH healthy, not speed.

Any bike with gears works for first duathlon. Hybrid, gravel, basic road bikes are perfect. No TT bike needed or carbon road — that's for later. Helmet mandatory, rest optional.

Beginner plan is flexible. Mild injury (1-discipline discomfort): pivot volume to other. Moderate injury (2 disciplines): pause plan 2-4 wk. Serious injury, target race changes to later — no race now.

Options: (1) Another sprint duathlon in 2-3 months (consolidate), (2) Standard duathlon plan (10K-40K-5K, next level), (3) Pivot to beginner triathlon (introduce swim). Most amateurs enjoy sprint duathlon 1-2 years before next step.