How to Connect Polar to ChatGPT and Claude.ai

Use the direct Polar Flow → Intervals.icu connection when it is available in your Intervals.icu account. Do not make Strava the preferred bridge for STAS unless you have to. First prove that one recent Polar workout is visible in Intervals.icu with duration, distance, heart rate, GPS, and laps or splits; then connect STAS and ask ChatGPT or Claude.ai to update your data.

• ✓Your watch must already sync correctly to Polar Flow.
• ✓You need an Intervals.icu account and access to Settings → Connections.
• ✓Use the same Intervals.icu account when signing in to STAS, ChatGPT, and Claude.ai.
• ✓If you also send Polar workouts to Strava, keep it as a social or fallback path, not as the first STAS data source.

1. 1Open Polar Flow and sync the watch first. If the workout is missing there, Intervals.icu and STAS cannot see it.
2. 2Open Intervals.icu → Settings → Connections and connect Polar. Enable activity download and the wellness fields you want STAS to use.
3. 3If the direct Polar connection is not available in your account, use a fallback such as Strava or Health Sync, but verify the activity detail carefully because fallback routes may lose fields.
4. 4Open Intervals.icu → Activities and check one recent Polar workout.
5. 5Only after the workout looks useful in Intervals.icu, sign in to STAS with that Intervals.icu account.
6. 6In ChatGPT, open STAS GPT. In Claude.ai, add STAS as a custom connector.

Check a real workout, not only the connection screen. STAS can only coach from fields that reached Intervals.icu.

• ✓Sport type, date, duration, distance, GPS track, pace, and elevation.
• ✓Heart rate, heart-rate zones, cadence, power, altitude, and laps or splits when the workout has them.
• ✓Polar wellness or recovery fields you care about, if they appear in Intervals.icu.
• ✓A second new workout syncing automatically after the first setup.

• ✓Completed workouts with sport type, distance, duration, pace, GPS, elevation, laps, and splits.
• ✓Workout physiology such as heart rate, zones, cadence, power, and load-related fields when they reach Intervals.icu.
• ✓Planning context from Intervals.icu: calendar, upcoming workouts, completed sessions, reports, goals, and your saved STAS rules.
• ✓Only the data available to STAS at the time you ask ChatGPT or Claude.ai to update your data.

ChatGPT and Claude.ai use the same STAS data layer. The authorization path is different in each AI app.

For Polar, do not assume that every structured workout created in STAS or Intervals.icu will appear on the watch automatically. Use STAS for analysis and planning, then check the exact Intervals.icu and Polar Flow workflow for planned workouts before relying on it for an important session.

• ✓STAS does not invent missing Polar fields. If Intervals.icu does not show GPS, HR, laps, power, or wellness data, ChatGPT and Claude.ai should not make strong conclusions from it.
• ✓Fallback routes such as Strava can be useful, but they may hide details STAS needs for coaching.
• ✓Structured workout behavior depends on Polar Flow, the watch model, sport profile, and what Intervals.icu can send or receive for that account.

Strava’s official MCP connector is useful if you want Claude to answer questions from live Strava data. It is read-only and focused on Strava history, trends, and training load. STAS is different: it is a training workflow around Intervals.icu, your saved profile, goals, rules, workout details, calendar planning, and approved plan write-back.

• ✓Use the Strava connector when the question is mainly about Strava history inside Claude.
• ✓Use STAS when you want ChatGPT or Claude.ai to coach from Intervals.icu data, saved context, and your plan.
• ✓For STAS quality, connect Polar directly to Intervals.icu when possible. Strava-routed activities can be visible but may hide details STAS needs: pace, HR, power, laps, and intervals.

• ✓If ChatGPT or Claude.ai says the Polar workout is missing, first check whether it is visible in Intervals.icu.
• ✓If Intervals.icu shows the workout without HR, GPS, laps, or power, fix the Polar → Intervals.icu connection before asking STAS to analyze it.
• ✓If only Strava activities appear, check whether the direct Polar connection is enabled in Intervals.icu and whether duplicate imports are being merged correctly.
• ✓If Claude does not see STAS tools, reopen the chat and make sure the STAS connector is enabled for that chat.

This page follows the STAS Intervals-first setup rules and Intervals.icu’s Polar connection model. If a field matters, verify it in Intervals.icu before relying on AI analysis.