AI triathlon coaching

A coach who actually reads your training data

Upload a session and get real physiological analysis — decoupling, grade-adjusted pace, CSS zones, power curves — not a generic summary. Then train a plan that adapts to how you're actually doing, not a fixed spreadsheet you outgrow by week two.

FIT, CSV & moreSwim · bike · runEvery distance & level
SUNDAY LONG RIDE · 3H12M
NORMALIZED POWER
218W
DECOUPLING
3.8%
TIME IN ZONE
"Aerobic engine held up well under load — 3.8% decoupling on a 3-hour ride is a strong signal your base is where it needs to be heading into build."

Built around what actually moves the needle

Not another spreadsheet with a chatbot bolted on.

Real session analysis

Upload your session data — a Garmin FIT file, a CSV export, and more — and get genuine physiological analysis: grade-adjusted pace, aerobic decoupling, CSS zones, power curves. Computed from your actual data, not a generic estimate.

Plans that adapt

Your plan automatically adapts to everything you've done — before you ever start a race-ready block, and as you train. Not a fixed spreadsheet you outgrow in week two.

A coaching voice that fits you

Direct and demanding, warm and encouraging, data-first and precise, or calm and process-focused — pick the coach that actually motivates you, not a one-size-fits-all tone.

Everything in one place

Training calendar, KPI tracking, race planning, and every conversation with your coach — all connected, so nothing gets re-explained every time you log a session.

Get faster where it counts

Kaidenz coaches all three disciplines — solidifying the strengths you already have and steadily building the weaknesses holding you back.

Swim

Lift your CSS, tidy your stroke

Turn threshold sets into real open-water speed — Kaidenz tracks your critical swim pace and stroke efficiency, then targets the sessions that move them.

Ride

Build durable power

Hold watts deeper into long rides as your decoupling drops. Kaidenz reads your power curve and load, and builds the endurance that actually shows up on race day.

Run

Run faster off the bike

Sharpen threshold pace and hold form when you’re tired — where triathlons are won. Kaidenz watches your grade-adjusted pace and cadence to build a run that lasts.

💪
Solidifies your strengths
Protects and sharpens what you're already good at, so it holds up under race pressure.
📈
Builds your weaknesses
Finds the discipline or system that's limiting you and gives it the attention it needs.

Meet the coaches

Four coaching personalities, one brain. Pick the one who actually motivates you — then see the same uploaded run analysed in each of their voices.

R
Rex
Direct. Demanding. On your side.
Best if you respond to accountability
S
Sophia
Warm. Honest. Builds consistency on trust.
Best for building a durable habit
M
Marcus
Mechanism first. The data decides.
Best if you want the "why"
K
Kai
Patient. Grounded. Plays the long season.
Best for long course & injury-cautious
SAMPLE UPLOAD · FIT / CSV
Hill Reps — 3 × 5min strong
Distance7.6 km
Time57:12
Climb310 m
Avg HR158 bpm
Rep HRs162 · 166 · 171
Cadence172 → 164 (rep 3)
Decoupling5.2%
Grade-adjusted paceAerobic decouplingCadence driftHR zonesRep-by-rep splits

Synthesized example. Your uploads get the same treatment — matched to your plan automatically, analysed against your zones.

SophiaWarm. Honest. Builds consistency on trust.

Three quality reps on 310m of climbing after the week you've had — that consistency is worth naming. I can also see rep three cost you: heart rate climbing, cadence dropping. Your legs were writing cheques your week couldn't cash.

For the block, this is two of three durability stimuli banked — we're on track.

Next time, let's agree on this together: if rep two already feels like an 8, rep three gets shorter, not braver. Deal?

VERDICT → BLOCK → ONE NEXT ACTION · the same discipline, four different voices

How your coach walks you through a block

Sophia builds momentum on trust — she names the wins, tells the truth, and keeps you consistent through the messy weeks.

Week 1 · assessment
Starts with your life, not just your FTP: 'Tell me what a realistic week looks like. We'll build a plan you can actually keep, then make it ambitious.'
Mid-block · adjustment
After a rough patch: 'You missed two sessions and that's okay — life happened. We don't claw it back with a hero week. We just get the next one in.'
Race week · send-off
'Look at how far you've come from week one. You've earned this start line. Enjoy it — I mean that.'

A complete plan for exactly where you are

Twelve full, periodised baseline plans — every distance, every level — based on the most modern training approaches and personalised to your fitness from day one. Your plan adapts to everything you've done before you ever start a race-ready block. Pick a cell to preview a real week.

Sprint
Olympic
70.3
Full
Beginner
8 wk
4–6h/wk
16 wk
6–9h/wk
20 wk
8–12h/wk
24 wk
12–16h/wk
Intermediate
10 wk
6–8h/wk
16 wk
8–12h/wk
20 wk
10–14h/wk
24 wk
14–18h/wk
Advanced
12 wk
8–12h/wk
16 wk
12–16h/wk
20 wk
14–18h/wk
24 wk
16–22h/wk
Beginner Sprint Triathlon
Week 4 — Stepping Up · a real week from this plan
Base phase8 weeks · 4–6h/wk
MON
swim
Endurance Build
40 min
TUE
bike
Steady + Short Burst
60 min
WED
run
Easy + Strides
35 min
THU
REST
Recovery & adaptation
FRI
swim
Threshold Set
45 min
SAT
brick
Long Bike + Short Run
90 min
SUN
run
Easy Run — Aerobic
35 min
SWIMEndurance Build · 40 min
Warm-up 200m. Main: 4×200m @CSS+20 with 45s rest. Cool-down 100m. Total ~1,100m.
Your longest swim yet. Breaking it into 200m chunks makes it manageable.
Every plan is a complete, periodised block — Base → Build → Peak → Taper — built on modern training science, with structured sessions and coaching notes. From day one it's scaled to your fitness, and it adapts as you train.

Why "adapts" isn't marketing

Every session you upload runs a closed loop. Here's exactly what happens between you finishing a workout and your plan changing.

1

You upload

Drop in a session file — FIT, CSV and more — from any swim, bike, run or brick. Kaidenz matches it to the session it was meant to be.

FIT / CSVauto-match
2

It analyses

Real physiology, computed from your stream — not an estimate. It reads what the session actually cost you.

decouplingGAPCSS zonespower curveTSSHR drift
3

It evaluates

Compares the result to your zones, recent load, and the block's intent — was this on-track, over-reaching, or a red flag?

vs. your zonesload trendblock intent
4

It adapts

Adjusts the coming days — nudges volume, swaps intensity, or holds the line — and tells you why, in your coach’s voice.

re-planexplained

More than a training plan

Kaidenz isn't only there for the twelve weeks before a race. It coaches the whole athlete, the whole year.

Coaches your off-season too

Between races, Kaidenz keeps you progressing — structured around your circumstances, your life and your goals, not a countdown to a single event.

Your data, any format

Upload the session data you already have — Garmin FIT files, CSV exports and more. No lock-in to one device or platform.

Adapts from your history

Before you ever start a race-ready plan, Kaidenz learns from everything you’ve already done — so day one is calibrated to the real you.

12 plans
Complete periodised blocks across Sprint, Olympic, 70.3 and full distance — for beginner, intermediate and advanced athletes.
Modern training science
The signals that actually matter — aerobic decoupling, training load, CSS, power and pace curves — computed from your own files, in the formats you already use.
4 voices, one brain
The analysis is identical and rigorous every time; only the voice changes. You get accountability, warmth, mechanism, or patience — your choice.
£20 / month
Cancel anytime. Free 14-day trial with an invite code — no card needed.
Day-to-day coaching conversation
FIT & CSV upload & analysis — swim, bike, run
Full training-plan library, all distances
All four coaching personas
Calendar, KPI tracking, race planning
Get startedSee full pricing details →