I have only tried outdoor walking, but that works for me (sort of). It takes a very long time, sometimes five minutes or more, for the GPS to lock onto the satellites; the GPS icon on the watch screen will continue to be animated (the concentric half-circles flashing on and off) until a lock is established. Once that happened, however, the tracking worked well, and there was a very accurate map in OnePlus Health showing my walk.
I said "sort of" because the distance tracking for that walk was very inaccurate. I measured the distance I traveled, and as shown in the map in OnePlus Health, on Google Maps as 0.56 miles. The distance reported by OnePlus Health was only 0.37 miles; it "lost" fully 1/3 of the distance I traveled. Hopefully this is a bug that OnePlus will be able to address soon. I have reported it on the watch support page.
Last edited: Apr 27, 2021