When they do a diagnose for ADHD they look also at how you were at young age. As that period is mostly a memory for us they use school rapports and relatives and look for marker's for ADHD.
When I get clean of something the period afterward's life is always more hectic it seems. So that could explain your feelings, which could get lesser over time.
And if you mean meditation and exercise makes you feel like you took a drug. Is that then the the reason you don't do them anymore? I know I get high as a kite from a succesfull meditation so I can relate to that. If that is what you ment. Weird enough both are very good for recovery so if possible one should just do it. And still the step to actually do it is quite hard.
Living proof. But do you a besides breaking the circle of boredom also experience that sort of stimulating after effect of these activities?