Live heart rate during a session
From the app’s English Help & Guide · Reference release 1.0.1
Turn it on
- Open More > Health on iPhone.
- Enable Live Watch monitoring.
- Optionally set a personal heart-rate reminder using a number you already understand or agreed with a clinician.
- Start a movement session; monitoring begins only after the session starts.
A sustained threshold reading asks you to check how you feel. It does not define a safe exercise zone, diagnose a problem, or override symptoms.