I am unsure of some of the recommended foot conditioning techniques mentioned...perhaps an attached video would assist? It is slower traveling barefoot, even when jogging on city streets as one tends to be slightly more cautious. The exception for me is when climbing a grade at altitude. The need to take deep breaths and go slower negates any discomforting as well as the fact as the weight is on the heels, the toughest part. Descending is defiantly slower as the weight is on the balls of the foot that contains more nerves. My wife and I hike, often in man made trails. These are particularly difficult in the spring after laying off a while. usually they consist of sharp gravel embedded in clay or some other media or perhaps cedar chips. Anyone can do this for a while but after a few miles it is hard to keep up. Usually on more primitive trails the terrain varies enough that it does not matter. Part of the conditioning is getting your mind used to the signals it receives from the nerves. You are not going to die from stepping on sharp rocks(or legos). Usually the pain subsides within a few steps. I have hiked in most of the western states including Hawaii. One of the most important aspect is having a plethora of smart ass remarks to us when interacting with fellow hikers. In short walking on gravel is a good way to toughen your feet. It also encourages more blood flow in case one has other maladies, which I do. I also do some kettle bell exercises on one foot to increase stability. As one ages, falling has more consequences. I have been mostly barefoot for 8 years and it has solved a few maladies. I can jog without my knee locking up. I have less back pain. Due to some malformed bones the podiatrist recommended surgery. I rarely have pain from that now. Every year my nails would turn black from long pheasant drives and eventually get toenail fungus. Fungus cannot live on bare feet. This diatribe should teach you fellows not to ask questions about this or shotguns. As for confessing to crimes of which you are innocent, my dentist firmly believes that I killed Lincoln, Kennedy as well as taking the Lindbergh baby.