A prior workplace had a group of people that would, daily after lunch, do a basic workout to keep the blood flowing. I loved this, and the social component made it easy. We did two minutes of lunges or squats, two minutes of plank, two minutes of wall sits, two minutes of push-ups, or something like that.
For anti-myopia, lots of natural light from big windows could help, giving you things to look at. For my own poorly lit space, I added bright lights that try to match the sun's visible spectrum. Though, who am I to say, one of my eyes has been getting blurry in the periphery lately...
A workplace that is flexible enough and not militantly busy allows you to take breaks during the day to go on walks. I work from home and do this at least once a day during the workday. It does take time I could be filling out tickets, but I find it revitalizes me, clears my head, helps me process emotions enough that it's absolutely worth it from a productivity perspective.
But part of what you're saying is that perspective is inherently antithetical to the type of rhythm that values movement. It would be naive to think that the point where well-being is at it's peak is also the point where maximal value is created for the company. I don't know how to get to the point where we value the one over the other, as a society. Ideally we don't have targeted solutions, but the kind of environment where the behaviors we want just "fall out" naturally... Having a real say in the type and manner of work and working environment would go a long way.
Structuring cities with better public transit would help cut down the sitting commute. At my prior job, I had maybe 40 minutes of walking there and back (+20 on the train), this was built in to my schedule, no special effort required. If I had a car I would have had much less daily exercise. (And I recognize we do not live in the kind of society where everyone has that time to spare, and that's a damn shame.)
I've also been thinking about hobbies that just involve more exercise. (Have personally found exercise for it's own sake hard to sustain.) How do I design my daily environment such that being active is the path of least resistance? (Maybe walking to the grocery store, and getting fewer things so I go more often. Maybe having my standing desk be easy to use.)
The answer might be just having less work, and more time to do things on your own. More breaks, more discretionary time, fewer hours worked. Remote work is good for this, valuing work done over butts-in-seats time.