Hi!
Those of you interested in openEHR modeling for physical activity data etc. from personal health platforms (like Google Fitness, Apple Health, Samsung Health, Withings, Garmin, Polar, Strava, MyFitnessPal etc.) may want to take a look at some of the info, links, mindmaps etc at https://github.com/regionostergotland/openehr_definitions/tree/master/mindmaps
Feel free to join the discussion and experimentation.