Details:
https://www.girlswithmuscle.com/images/full/1... https://www.girlswithmuscle.com/images/full/1...
That's what the "teen" tag is for.
This is the same as creating a thread called "Abs." It's redundant.
If you had something more specific in mind, such as 18-21 of a certain body type or wearing a certain apparel or etc., then the thread would have been kept.