I’ve seen guys on skateboards using a long pole to push them along, like a gondola.
That is called land paddling and would still involve a certain fitness level for one’s legs, hips, etc. plus falls are expected. For those able, it does free the requirement of having to push off with leg power and a Kahuna Big Stick or other land paddle can handle the uphill grades of those trails made from former railroad beds. If one does a few miles it gets to be a real workout and it is much more challenging to one’s balance than bicycling.