SublimeZM said:
give some examples of stuff you thought u knew but didnt, as a teen, and how u changed them. IMO thats the most informative type of bb advice
1) i followed routines of my favorite pros instead of experimenting with different rep ranges, sets, and exercises.
2) I remember I was working at McDonald's during high school and I thought if I ate their hamburgers it was an adequate protein source. I made some right decisions there eventually by only eating their grilled chicken.
3) Mind-Muscle connection: I either did whatever it took to complete the rep or i was simply moving the weight and not concentrating on making the muscle work.
4) I used that god awful Weight Gainer 5000 thinking that would pack on the muscle.
5) I bought these sugary "body building" energy drinks at the gym for workouts. I think they contained around the same nutritional content as a MT. Dew.
6) I missed meals.
7) I did not get adequate rest by way of sleep or with days off.
8) I didnt train certain body parts such as rear delts and hamstrings directly.
9) I wasnt keeping track of cals/protein/fat/carbs. I mean it wasnt super important that i knew those figures exactly at that stage but i would of had a better idea if i was eating enough to grow or taking in enough protein.
etc
etc