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.