Everyone with ADHD is not hyperactive and even when it is present, hyperactivity tends to lessen and change as children grow into adulthood. This lessening of hyperactivity is one of the reasons it was previously thought that children grew out of ADHD. It is now know that ADHD continues into adulthood and hyperactivity, although different, does not necessarily go away. In children, hyperactivity is excess energy, the inability to sit still and constant talking. In adults, hyperactivity can...