My 14 year old son appears to perform well in sports (basketball and baseball) when not on stimulants. He seems to be more restrained while playing on meds. We manage well because we give him med in the morning and practices or games are usually late afternoon or evening and stim usually wears off by then. With games on the weekends we don’t give him the stimulant. As for growth and no appetite, after a while we were able to get the right dose (lower than most kids his age and size) and is in the 75% for growth/weight. He eats breakfast before his med, and still has lunch. When I pick him up at 3:30, he’s starving but still able to focus to get through homework! I think it likely differs from person to person, but we need him on stims for school to help with focus and attention – without it we saw his grades drop. Unfortunately it may be trial and error for you.. best of luck.