I was the slowest runner in first grade--even the fat kid outran me in the 50 yard dash. Was I weird!
Today? I'm 70, and I run. Yesterday I ran about 8 miles on trails. Because while I can't run fast, I can run far. Didn't find that out until like 8th grade--all the runs until then were short distances.
So I can run distances, but I'd probably still come in last at the 50 yard dash. Maybe I'm still weird, but I like it.