Complete tomboy here! Where I grew up it was predominantly boys so I played lots of football (soccer to the American gals) and lots of running around and boisterous games. I've ridden bikes since I was about 5 years old, I remember jumping off large ramps on my bike as a 7 year old (where did that bravery go I wonder). I used to love all sorts of sports at school and was always one of the first to be picked for teams.

I had a gap from about 14 years until 17 years old where I didn't have a bike, then I saved up and bought my very first mountain bike - a rigid purple muddy fox with....canti brakes (the innovation of the time). It was a 19 inch frame (I now ride 14 or 15 inch max) and miles too big for me but I loved it, even used it to cycle to work when I was doing my Post Grad course. It got stolen from my parents garage when I was about 23 years old.

I was heavily into martial arts (another Tae kwon Do person here) from about 20 to 24, basically until I moved to the place I am now. I had ignored any exercise from age 18, basically from entering uni, and it was obvious from my waistline. TKD gave me back the love of being fit again.

At 28 I bought a good quality mountain bike (a 17 inch frame so still too big) and I haven't looked back since. Like the OP I had no problem picking it up.