-Tried a quick google on this but couldn’t find anything concrete on the first query., but I wonder if having wind blowing in your face would trigger any sort of increased sense of movement, like triggering a fan in your environment to turn on as you move.
-Not sure if anyone else remembers that “electric-shock 6-pack abs” product (cant remember the actual name) but it would send small amounts of voltages into your abdominal muscles and it claimed to have similar results to doing situps. I’ll never forget how ridiculous that commercial looked haha. I wonder if something similar could be used to force mild contractions on the relevant leg muscles.
-I don’t think this is a thing yet, but perhaps it’s possible to develop some kind of rolling shoes that allow you to easily walk in place without slipping and falling of course, and going beyond just jogging in place.