25 years ago I thru-hiked the Appalachian Trail, and hikers there have a saying, "It takes more head than heel". I didn't believe it at first, until I met seve

25 years ago I thru-hiked the Appalachian Trail, and hikers there have a saying, "It takes more head than heel". I didn't believe it at first, until I met several thru-hikers over the age of 60, hiking 15+ miles a day, carrying 50+ pounds of gear, up and down over a trail designed intentionally to go valley to summit to valley to summit. After a few weeks, I noticed that I was no longer looking at the ground. At least, not the ground right in front of my feet. My mind was able to see the terrain several yards ahead, and subconsciously my feet would know where the rocks are. This became an essential skill upon entering Pennsylvania, where the AT is more boulder field than trail. I started to call it "Radar feet". Edit: it was 25 years ago... sheesh my memory. About two years before I heard about an obscure programming language called Python...