Indeed.
If in my youth, instead of playing video games and wasting time on computers, I did sports or just overall physical activities, my body would at least be normal. It would be much better.
Today I am super scrawny, and trying to put meat on bones is laughable, my body looks atrophiated and white like a corpse.
My bones are thin as fuck. There are many scietific articles that talk about bone structure at the end of childhood and teen years.
It's essential for males to abandon the computer and dedicate themselves for physical activities at that age.
Anyone bellow 18 should be outside, using their muscles to their full potential, running, riding a bicycle, practicing martial arts, swimming.
My body is like the body of Smeagol from Lord of The Rings.
If I could travel in time, that is the only thing I would tell my young self:
"Burn your PC and playstation and go exercise RIGHT NOW!!
I really can't stress enough how important it is to eat properly, lots of meat and drink water, and exercise at that age.
All the rest of your life depends on the bone structure you acquire at that age.
After that, no amount of gym will ever give you a normal body.
Yes, "there is no exercise for your face".
But it's the difference between at least having a normal body, or being an skeleton