On the Apple Watch Ultra 2, the Action button is the shortcut that most often explains a missing workout: it can start a workout, mark a segment, start a dive or trigger a siren, and a press at the wrong moment can end a session or start a new one without you noticing. A workout is saved only when it ends properly, and Apple's pages describe the Workout app's controls. Open the Fitness and Health apps on the iPhone and look at the date, since the watch may not have synced, and check that Background App Refresh and Bluetooth are on.
The checks in more detail
The Ultra 2's long battery means it often records many hours; a very long workout may take a while to sync. Multisport and Dive sessions are separate workout types with their own records, and Backtrack, the breadcrumb feature, is not a workout at all, so look under the right category. If you used a third-party app for hiking or diving, check it saves to Health. If the watch ran flat during a very long day, the session may be lost. Restart both devices and wait for the sync.
For long outings the Ultra 2 offers multi-sport and ultra-distance workout types with power-saving options, and they record fewer GPS points to save battery; if a route looks coarse, check that the Low Power Mode with Fewer GPS and Heart Rate Readings is not on for the workout. Review the workout's route in Fitness and compare it with your memory of the trip to judge the record. After a very long activity, give the iPhone time to sync, since Ultra 2 workouts with many GPS points and heart-rate samples are large; keep the iPhone near and on Wi-Fi for a few minutes after the workout ends.
If the workout shows in Fitness but not in a third-party app such as Strava, check that app's connection to Apple Health and re-authorize it, which restores the transfer of workouts to the service. Remember that the Ultra's Action button can also be assigned to Dive, and a dive session is recorded in the Depth app, with the data stored under a different heading in Fitness; look through the sections one by one. If a workout that you recorded earlier in the week is gone, check the date filter in Fitness, which may show only recent activity.
Differential
Likely causes of “Apple Watch Ultra 2 workout or activity was not recorded correctly”, and how to tell them apart
- 1
The Action button ended or started a session
What separates it A short unexpected workout exists instead
How to confirm Check what the Action button is set to in Settings, Action Button
- 2
A workout not ended
What separates it The session is not saved
How to confirm End it with the End button
- 3
A sync delay
What separates it It shows on the watch, not the iPhone
How to confirm Keep the iPhone near and wait
- 4
The wrong workout category
What separates it You look in Workouts, not Dives or Multisport
How to confirm Check the right section
- 5
A third-party app without permission
What separates it Data missing in Health
How to confirm Allow it in Health, Sharing, Apps
Before you touch a setting
Record this first — changing settings destroys the evidence
- What the Action button is set to
- The workout type
- Whether the watch synced
- Whether the watch ran flat
Try in this order
0 of 6 completedCheck the Action button setting
ReversibleSettings, Action Button.
Open Fitness and Health
ReversibleOn the iPhone.
Look in each category
ReversibleWorkouts, Multisport and Dives.
Keep the iPhone near
ReversibleSo the watch syncs.
Restart both devices
ReversibleAnd wait.
End workouts properly
ReversibleWith the End button.
Model-specific
What is true of this model and not of its siblings
- Action button
- A press can start or end sessions.
- Categories
- Dives and multisport are separate.
Stop boundary
When this stops being a self-service repair
- !If a workout is gone after syncing, contact Apple Support
- !If a third-party app loses data, contact its developer
- !Keep the watch charged
Evidence ledger
Sources behind this answer
Exact questions
Common questions
Why did my Ultra 2 workout vanish?+
It may not have been ended or synced.
What does the Action button do?+
Starts workouts and other actions.
Is Backtrack a workout?+
No.
Where are my dives saved?+
In their own category.