

For me at least: getting out into nature. Cycling can easy get you out and into the countryside. And is easy on the joints etc. I prefer road bikes as I can see more.
Otherwise, I often drive to walks or runs with good views etc. I cycle to a nice forest park run.
The other trick that works with me is statistics. Going for Strava or park run segments/records can really motivate me. I also now use the wanderer.earth extension to get ‘points’ for exploring new places I have never been.
Going to the gym sucks. Swimming is nice in moderation.
No.
People (mostly) use sites like this because of the threaded discussions.
It would also be hell to moderate.