For orthopedist/quiropractics/ skeleton-doctors: �Should I use air-tennis or ordinary shoes or ?

When we are without a doctor, the very thing you are doing is the right course to determine the best way. Try the shoes you mention and see which give the best results. No backache/foot aches. But some foot aching is probably quite normal after all that hiking. You can soak your feet, or put an orthotic appliance in. I tried that dr scholls food tests in Walmart. They told me what to buy. I can look at that then get the next best thing, since scholls wanted 50$ and I don't have flat feet.