The first day I decided to become a distance runner, when I was 14 years old, I went out and ran four miles around the local lake just outside my small hometown. This was without any prior training, to speak of. It was not an easy effort, but not terribly difficult either — somewhat challenging, but it came naturally.
I had no special experience related to running other than a very active childhood playing outside just about every day exploring the neighborhood, taking part in little league sports, and running short sprint races against friends in local grade school and middle school competitions, or during playground recesses from time to time.
When it came to running specifically, as with these short races, I did nothing much longer than sprinting probably 75 to 100 yards, or playing games like “tag” where one might be continually moving for some time but running or sprinting only for intermittent short bursts. As far as track and field went, I had been more into long-jumping and pole-vaulting in the preceding years during middle school. Golf was also a pursuit, affordable to a wide swath of the middle and lower-middle classes in those days, and all of us except some of the adults walked and carried our own clubs around the course, rather than riding in carts.
Prior to the day mentioned above, I had gotten my feet wet a few times in the preceding weeks, running solo time trials of perhaps a mile and a half around the local neighborhood streets, but no more than that, just to see what I could do.
The second day, I ran four miles around the lake again. And each day after that I continued to run four miles or so, trying out different routes for variety. But immediately I was running almost 30 miles a week.
Starting out with distance running like this did not seem that unusual to me. I had always had more endurance than the other kids, whatever the game we were playing. Others always wanted to quit before I did. I did not have a high energy level, but the ability to endure had seemingly always been there.