Nope, not at all really. I was reasonably physically fit as a child, but uncoordinated and lacking upper body strength. As a child, my dad gave me vitamins, 90% natural/organic food, usually cooked from scratch, and I'd play outside all day. After my parents divorced, my mom didn't know how to cook and bought only processed food, and coincidentally during that time, I didn't have my big yard in the middle of nowhere I used to have as a kid, my mom had less money to send me to try out sports (I did do a hockey program for a couple weeks in like 6th grade, last sport I really tried) and I had to quit judo class due to lack of money, too. So as a teenager, a really crappy diet, plus lack of money for pursuing sports, and me getting really involved in anime/video games/etc, meant terribly out of shape. At 5'7, I was like 200lbs, and then I gained some height, and my highest weight was probably like 18-19 at 230 and 5'9.
After I started ice skating (which is super cardio intensive especially when you first start and have terrible strength and technique), I dieted and got myself down to 180, now I'm at 195 from a combo of weightlifting and eating, and I'm pretty happy with the amount of muscle I have, and don't think I've gained much if any bodyfat, but now I got a "weightlifter gut" but I'm happy I can now see the muscles in my arms, though. My genetics seems to be sorta weird, long arms, small torso/not wide shoulders, then tree trunk legs. I can only bench like, I'm guessing 135 on a flat, I can do 125 incline, which sucks, but meh. My first time squatting, I managed to do 225 to "parallel" which may or may not have been that low, but still, it was more than what the guy showing me could do, and I felt pretty sweet. Also my first time deadlifting, after a month or two of squatting, I pulled like 265 at 180something bodyweight.
Anyway, yeah, that's how physically fit I was as a teen, and now. But yeah, as a teen, pretty crap, I knew people who were like 300lbs and worse than me, but really, I wasn't good at all.