Preteens and young teens bodys does not produce enough hormones to allow the body to bulid big muscles.
Preteens generally have lower levels of testosterone and other hormones that contribute to muscle growth compared to older teens. Their bodies are still developing, and the growth plates in their bones are not fully fused, which limits their potential for significant muscle hypertrophy. Additionally, preteens often lack the experience and technique in resistance training that older teens may have, further affecting their ability to build muscle size effectively.
teens and preteens' bodies are still developing and adults' bodies are not
No, just for teens.
Teens
Super Smash Bros Brawl is made for preteens and teens. Even adults like to play the game. The game is rated as Teen.
The same way as for any other age group . By exercise and diet.
Sleepover films are movies that teens or preteens watch at sleepovers.
Ephebophile or paedophile (for teens and preteens respectively)
Mostly for preteens : Action like Harry Potter, Percy Jackson, Guardians of Ga'Hoole Mostly for teens: The same as preteens but also romance like the Twilight series
Preteens are: 11-12 Early teens are: 13-15 Mid teens are: 16-17 Late teens are:18-20 Woohoo early teens!
In Canada they are referred to as 'Tweens', but some preteens don't always like that label either. 'Kids' seem to be the term most widely used by adults because it includes preteens and teens.
There isn't any known AOL for preteens. However, there is a AOL kids (KOL) an one for adults, which could also be used for teens. I think you might be satisfied with both.