how to access past workout data

You can export all health and fitness data from the health app;

Export and share your health data

Tap your profile picture or initials at the top right.

If you don’t see your profile picture or initials, tap Summary or Browse at the bottom of the screen, then scroll to the top of the screen.

Tap Export all health data, then choose a method for sharing your data.

Your data is exported in XML format, a common format for sharing data between apps.