Votre VO2max stagne ? Analysez vos données Garmin avec Claude AI

Day 100: Is Your VO2max Stuck? Analyse Your Garmin Data With Claude AI

Are you working out multiple times a week but your VO2max won't move? A plateau despite consistent training almost always points to something hidden in your data — too much medium-hard "grey zone" running, not enough easy volume, missing high-intensity work, poor sleep, or chronic under-recovery. Your Garmin has already recorded the evidence. Claude AI can read the whole export and tell you exactly what's holding you back.

Step 1: Export your Garmin data

Go to garmin.com → Account → Data Management → Export Data.

1. Log in to your Garmin account
2. Click "Export Your Data"
3. Garmin will prepare a ZIP file — this can take a few minutes to a couple of hours. You'll get an email when it's ready.
4. Download and unzip it. Look for the DI_CONNECT folder — that's where your training load, VO2max history, HRV, sleep, and recovery data all live.

Step 2: Choose your tool

You need a version of Claude that can read files directly from your computer — not the regular chat at claude.ai. You have two options:

Option A: Claude Cowork (easier — no terminal needed)

Claude Cowork is a desktop app for Mac and Windows. It works like Claude Code but without any command line — you just point it at a folder and describe your task.

1. Download and install the Claude desktop app from claude.ai/download
2. Open it and log in with your Claude account
3. Grant Cowork access to your unzipped Garmin export folder when prompted
4. Paste the prompt from Step 3 and let it run

Requires a paid Claude plan (Pro at $20/month).

Option B: Claude Code (more powerful — requires a terminal)

Claude Code is the developer-focused version. It's slightly more setup but gives Claude full access to the folder structure.

Open your terminal

On Mac: Press Cmd + Space, type Terminal, and press Enter.

On Windows: Press the Windows key, type PowerShell, right-click it and choose "Run as administrator".

Install Claude Code

Paste this into your terminal and press Enter:

curl -fsSL https://claude.ai/install.sh | bash

Text will scroll by — that's normal. When it stops and shows a new cursor, it's done.

Log in and navigate to your folder

Type cd (with a space), then drag the unzipped Garmin folder from Finder or Explorer into the terminal window. Press Enter. Then start Claude Code:

claude

It will open a browser window to log in — use your existing Claude account.

Step 3: Use this prompt

Once Claude has access to your Garmin folder (via Cowork or Claude Code), paste this prompt. It works through three phases: reading your data, diagnosing why your VO2max has stalled, and telling you what to change.

You are a data-driven endurance coach and sports scientist.
I train multiple times a week, but my VO2max has plateaued — it is not improving. I have attached my full Garmin data export. The most important data is in the DI_CONNECT folder. It contains: activities (runs, rides, walks, etc.), sleep data, HRV status, body battery, stress scores, training load, training readiness, VO2max history, intensity minutes, and recovery metrics.
Your job is to figure out WHY my VO2max is stuck and what to change. Work through three phases. Complete each fully before moving to the next.

PHASE 1 — ANALYSE
Read all files inside the DI_CONNECT folder. Then extract:

My VO2max history and how long it has been flat or declining
My average sleep quality, duration, and HRV trend
My weekly training load: volume and intensity distribution
My training consistency — gaps, monotony, overtraining signals, recovery patterns
My intensity balance: what percentage of my activities fall in Zone 1–2 (easy) vs Zone 3 (grey zone) vs Zone 4–5 (hard)?
Any red flags: chronic fatigue, high resting HR, suppressed HRV, under-recovery

Present this as a concise athlete profile with specific numbers.

PHASE 2 — DIAGNOSE THE PLATEAU
Based only on my data, identify the specific reasons my VO2max has stalled, ranked by impact. Consider the usual causes and tell me which actually apply to ME, citing my numbers:

Too much moderate "grey zone" training and not enough true easy Zone 2 volume
Not enough genuine high-intensity VO2max work — or too much of it without recovery
No progressive overload: the same sessions and the same load week after week
Poor sleep, suppressed HRV, or chronic under-recovery blunting adaptation
Training monotony or accumulated fatigue masking my real fitness

For each cause that applies, point to the data that proves it.

PHASE 3 — HOW TO BREAK THE PLATEAU
Give me a prioritised set of changes to restart progress, based only on what you found:

The single biggest lever I should pull first
Concrete adjustments to my weekly structure: intensity distribution, key workouts, recovery
Sleep and recovery targets based on my actual numbers
What to stop doing, not just what to add

End with: the one change most likely to unstick my VO2max, and the single metric to watch each week to confirm it is working.

Let it run — it takes a minute or two to read everything. What comes back is not a generic plan. It's a data-grounded diagnosis of why your VO2max stalled and a prioritised fix built from your own numbers.

What you'll get back

Based on the data, Claude will deliver:

• How long your VO2max has actually been flat — and what changed when it stalled
• A ranked list of the specific reasons it's stuck, each tied to your real numbers
• The single biggest lever — whether that's more easy Zone 2, real VO2max intervals, better sleep, or more recovery
• Concrete weekly adjustments, including what to stop doing
• One metric to track each week so you know the plateau is breaking

This is the kind of analysis that used to require a coach and weeks of manual review. Your Garmin already collected the data. Claude just needs a good prompt and access to the folder.