How to fix inaccurate stress readings during activity

• Why an activity may be recorded as a stress response
• How to improve accuracy
  • How to edit your session and log an activity instead
  • Adjusting past activities, check-ins, and sleep

Why an activity may be recorded as a stress response

If you notice stress responses in your Timeline during physical activities, this may happen because the app didn’t correctly recognize the activity type.

Stress responses are detected based on changes in your heart rate and physiological signals. During physical activity, your heart rate naturally increases, which can sometimes resemble a stress response to the algorithm.

Activities such as walking, running, or cycling are usually classified as Physically Active based on their intensity. However, in some cases, the combination of movement and elevated heart rate may be misinterpreted, resulting in a stress response being recorded instead.

How to improve accuracy

To help the app better distinguish between physical activity and stress responses, you can edit these moments and log them as activities. This improves the accuracy of your stress tracking over time.

How to edit your session and log an activity instead

1. Go to the Timeline tab.

2. Tap the Reactivity Monitor (lightning icon).

3. Find the point where the stress response started.

4. Tap the + icon and select Log an activity.

5. Enter the activity name, start and end time, and select a category.

   • Choosing a category is important—without it, the change won’t apply.

6. Tap Save.

7. Fully close the app and reopen it.

Once reopened, the stress response (purple) should update to your logged activity (blue).