i am 13 i wiegh 86 - 90 lbs cause my wight goes up and down alot i am 4'9 i am very active too but i take this stupid adhd meds cause my mom thinks i have it but when i dont take it, i tend to eat aaalooot more and in the summer i dont take it plus im gonna start working out with my dad too ps. i dont think i went thru puberty yet