Amazfit sync troubleshooting

Amazfit not syncing with Intervals.icu? Start here

Amazfit and Zepp can work well with Intervals.icu, but activity sync, wellness data, HRV, and structured workout push are different paths. This guide separates the common failure points.

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Quick answer

Most sync problems come from the wrong Zepp account, a connection that needs re-authorization, unsupported workout push, or expecting wellness/HRV to behave like activity sync.

Check that Intervals.icu is connected to the same Zepp account as your watch.
Activity sync and wellness/HRV sync are separate settings.
Workout push only works on supported Amazfit models.
Open Zepp on your phone after changing planned workouts.

Find which sync is failing

Do not troubleshoot everything at once. First decide whether the missing data is an activity, wellness/HRV, or a planned workout.

Activities

Runs, rides, walks, and workouts should arrive in Intervals.icu after the watch syncs to Zepp.

Wellness

Sleep, resting HR, and daily wellness fields may need their own Intervals.icu connection options.

HRV

HRV/rMSSD support depends on the data Zepp exposes and the options enabled in Intervals.icu.

Workout push

Sending structured workouts from Intervals.icu to Amazfit is model-limited and usually requires opening Zepp to sync.

Model and feature checks

Amazfit model names change quickly, so treat this as a practical checklist rather than a permanent compatibility promise.

T-Rex 3 / T-Rex 3 Pro

Strong candidates for structured training workflows. Check both activity sync and workout push separately.

Balance / Balance 2

Good Intervals.icu workflow candidates, especially when Zepp is kept open for plan sync.

Active / Active Max / Bip

Activity sync may work while structured workout push or wellness fields can be limited.

Older models

If activities sync but workouts do not push back, the watch may simply not support that feature.

Amazfit model checklist

Use this as a first-pass compatibility check before blaming STAS or Intervals.icu. Final support still depends on the current Zepp and Intervals.icu connection.

Model group	Activity sync	Wellness / HRV	Workout push	What to check
T-Rex 3 / T-Rex 3 Pro	Yes	Usually	Check settings	Confirm the watch uploads to Zepp first, then reconnect Amazfit in Intervals.icu after firmware changes.
Balance / Balance 2	Yes	Usually	Check settings	Open Zepp after adding planned workouts so the calendar can reach the watch.
Active / Active Max	Check settings	Check settings	Limited / model-dependent	Start with one simple planned workout. If it does not appear, activity sync may still be the only reliable path.
Bip series	Check settings	Limited / model-dependent	Limited / model-dependent	Expect basic activity sync first. Treat HRV and structured workout push as optional until verified.
Older Amazfit models	Check settings	Limited / model-dependent	Limited / model-dependent	If activities arrive but plans do not, the limitation is often the watch model, not the STAS setup.

Troubleshooting steps

Confirm the Zepp account

Intervals.icu must be authorized with the same Zepp account that receives data from your watch.

Reconnect Amazfit in Intervals.icu

Remove and reconnect the Amazfit/Zepp connection if activities stopped arriving after a firmware or account change.

Check wellness and HRV options

Enable wellness and HRV options separately if you expect recovery data, not just completed workouts.

Test one planned workout

Create a simple structured workout for tomorrow, sync Zepp, and confirm whether the watch model supports workout push.

Where the problem usually is

Zepp side

The watch has not uploaded to Zepp, the wrong account is signed in, or the phone app has not synced yet.

Intervals.icu side

The connection needs re-authorization, wellness options are off, or the planned workout is not eligible for push.

Watch support

The model can sync activities but may not support structured workout push or all wellness fields.

FAQ

Why do activities sync but planned workouts do not appear on the watch?

Activity import and workout push are separate features. Your model may support one but not the other.

Why is HRV missing in Intervals.icu?

HRV depends on what Zepp exposes and whether HRV/rMSSD download is enabled in the Intervals.icu connection.

Should I route Amazfit through Strava?

For STAS, the cleaner path is Amazfit to Intervals.icu directly. Strava can lose wellness and structured training context.

How does STAS help after sync works?

Once Intervals.icu has your data, STAS can help ChatGPT or Claude explain load, recovery, HR zones, and the next plan decision.

After sync works, make the data useful

Connect Intervals.icu to STAS and ask ChatGPT or Claude what your Amazfit training data says about load, recovery, and the next week.