I ran long distance for a lot of years, mostly marathons and ultramarathons. I don't race much anymore but I still run 3-5 miles a day, I doubt I would have any problem keeping up with you. Could you keep up with me? Maybe. I said in an earlier post that no one is walking more than 3-4 miles a day, but I could see 5-6. 20 miles? Not a chance.