It’s not just Strava. Hands up who has an iPhone - personal or work.
Right, have you turned off the automatic tracking and logging of your location? Well, it’s your handset’s location but it’s safe to assume that you’ll be with it, and I don’t mean the tracking you get when you move from cell tower to tower. I’ve read of numerous cases criminal and linked to divorce where individuals have been caught out as being somewhere they said they weren’t.
Have a look in your own phones logs, you might be surprised:
Settings -Privacy - Location Services - System Services - Significant Locations - ensure the toggle is set to off. Now you can go to the pub on safety having told C-in-C Home you were popping out to B&Q or suchlike.
Apparently this isn’t sent to Apple, it just stays on your phone, which is fine assuming you have and know you have full and sole control of your phone and its functions.