I was always the very active scrawny tomboy. Running rampant through the woods, riding my bike everywhere, climbing trees, building forts, skateboarding for days on end (and in the 1970's we rode LITTLE boards), running everywhere. I did a few of the obligatory team sports, but I really s*cked at them. Set a city record (by 30 seconds) for the 3/4 mile run, though. (that was the longest distance girls were allowed to race back then)
I don't know that my loner-athleticism had a huge influence on my adult love of biking, other than that I've always loved riding trikes, bikes, scooters, and skateboards. Racing has never been my thing, but endurance has always been! To this day I have no desire to race, but I'd love to do some long distance rides that push me to my limit.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson