#1Swim · Bike · Run · Tri-Train

Train like a triathlete: plan, analyse and improve your triathlon training.

Tri-Train pulls your sessions from Garmin or your FIT files, turns them into fitness, fatigue and form, builds your plan all the way to race day — and lets Claude answer questions about it in plain sentences.

Garmin
FIT & GPX
Claude as your training assistant (MCP)
25 calculators
AI on our own hardware

Form & FitnessSample athlete

Fitness · CTL

Fatigue · ATL

Form · TSB

Today · Run · 45 min easy · TSS 38

Into the water

01Swim · Connect· 1.5 km

Your data flows in by itself.

Connect Garmin once, and every session arrives on its own, with the original FIT file, swim lengths, sleep and HRV. No Garmin? Upload FIT or GPX files.

Garmin sync, files any time: 2× a day; Garmin sync, files any time
Original file, not a summary: FIT; Original file, not a summary
Sleep, resting HR, body battery: HRV; Sleep, resting HR, body battery

Connect Garmin

Incoming

live

Technique 20×100
3.2 km · 1:02 h
TSS 54
Garmin
Endurance Z2
82 km · 2:30 h
TSS 128
FIT
Threshold 3×10′
12.4 km · 58 min
TSS 76
Garmin
Open water
1.9 km · 34 min
TSS 31
Garmin

T1From raw data to a number you can trust.

02Bike · Analyse· 40 km

Every session becomes a number.

TSS from power, pace or heart rate — and from that fitness (CTL), fatigue (ATL) and form (TSB). Power curve, zones, ramp rate, and an AI analysis for every activity, computed on our own hardware.

tri-train.com/app/analytics

Tri-Train analytics with PMC curve, ramp rate and zones

TSS 128
Training load
IF 0.82
Intensity
NP 238 W
Normalized power

Training load

TSS, IF and normalized power per session — for swim, bike and run, not just the bike.

PMC curve

Fitness, fatigue and form over months. You see whether the build is working before race day tells you.

AI analysis

A written verdict for every activity. Your data stays on our hardware, not with a cloud AI provider.

Explore the analytics

T2From analysis to the next session.

03Run · Plan· 10 km

The plan runs to the finish line.

The plan generator turns your goal race, profile and current form into phases, weekly load with a ramp cap and concrete sessions. Move them around in the calendar; the interval builder sends them to your Garmin watch.

16 weeks to race day

Weekly load · recovery weeks · ramp cap

Base
Build
Peak
Taper
Race

On your wrist

Structured intervals go straight to your Garmin — targets in watts, pace or heart rate.

Plan meets reality

An imported activity is matched to that day's planned session by itself — same day, same sport, a duration that fits. Nothing to tick off.

tri-train.com/app/calendar

Tri-Train calendar with planned swim, bike and run sessions

Open the training planner

04Final straight · Claude· 400 m

Ask Claude instead of exporting.

Tri-Train is a hosted MCP server for Claude. Connect it once via OAuth, and Claude reads your real sessions, sleep and form — and adds the next session when you ask. No screenshot, no CSV, no numbers typed by hand.

Tools: read, plan, change: 20+; Tools: read, plan, change
No API key, one click to disconnect: OAuth; No API key, one click to disconnect
Every change is journaled and reversible: Undo; Every change is journaled and reversible

Connect Claude

claude.ai

Tri-Train connected

How did my week go?
7 h 40 min, TSS 512 across 6 sessions. Form is at −8: Thursday’s threshold run is fine, keep Saturday easy.
Add an easy hour on the bike on Thursday.
Added: Thursday, bike, 60 min endurance Z2. Want me to send it to your Garmin?
Why was my heart rate so high on the long run?
The night before: 5 h 50 of sleep and HRV 12 % below your average. The run was on plan — your body wasn’t.

Finish

Train like a triathlete: plan, analyse and improve your triathlon training.Train like aswimmer.