Yes, I used to walk 5 miles
Yes, I used to walk 5 miles barefoot at least three times per week, and at least a third of it was on gravel.
I'm only running two or three times per week, 2.8 -3.1 miles per run, all on asphalt or concrete.
Walking builds sole toughness more than running anyways, the landings are'nt as light, and for most people, myself included, it is a heel strike on pavement.
I rest my feet and legs on running days off by cycling, but I think if I stabilize at the current distance and speed I will be able to add walking to the days off easily.
Barefoot running is WAY different on the feet than barefoot walking is!
I also have'nt been skating much at all, trying to rest for the weekend races I've been entering.
It's all been based on improving my race times, but I think soon I will have reached my max healthy speed (8 minute miles for the 5K) My PR is 8:22 mm for the 5K, and just this past May I was running 12 1/2 minute miles.
I'm 57, and cardio capacity is really my limiting factor.
I'm only 5' 5 1/2", with short legs for that overall height, so I really get spinning.
My coronary arteries are'nt what they were when I was younger, heredity sucks!