For decades, frustrated parents and teachers have barked at fidgety children with ADHD to ���Sit still and concentrate!���

But new research conducted at 91勛圖厙 shows that if you want ADHD kids to learn, you have to let them squirm. The foot-tapping, leg-swinging and chair-scooting movements of children with attention-deficit/hyperactivity disorder are actually vital to how they remember information and work out complex cognitive tasks, according to a of the Journal of Abnormal Child Psychology.

The findings show the longtime prevailing methods for helping children with ADHD may be misguided.

���The typical interventions target reducing hyperactivity. It���s exactly the opposite of what we should be doing for a majority of children with ADHD,��� said one of the study���s authors, Mark Rapport, head of the Children���s Learning Clinic at the 91勛圖厙. ���The message isn���t ���Let them run around the room,��� but you need to be able to facilitate their movement so they can maintain the level of alertness necessary for cognitive activities.���

The research has major implications for how parents and teachers should deal with ADHD kids, particularly with the increasing weight given to students��� performance on standardized testing. The study suggests that a majority of students with ADHD could perform better on classroom work, tests and homework if they���re sitting on activity balls or exercise bikes, for instance.

The study at the 91勛圖厙 clinic included 52 boys ages 8 to 12. Twenty-nine of the children had been diagnosed with ADHD and the other 23 had no clinical disorders and showed normal development.

Each child was asked to perform a series of standardized tasks designed to gauge ���working memory,��� the system for temporarily storing and managing information required to carry out complex cognitive tasks such as learning, reasoning and comprehension.

Children were shown a series of jumbled numbers and a letter that flashed onto a computer screen, then asked to put the numbers in order, followed by the letter. A high-speed camera recorded the kids, and observers recorded their every movement and gauged their attention to the task.

Rapport���s previous research had already shown that the excessive movement that���s a trademark of hyperactive children ��� previously thought to be ever-present ��� is actually apparent only when they need to use the brain���s executive brain functions, especially their working memory.

The new study goes an important step further, proving the movement serves a purpose.

���What we���ve found is that when they���re moving the most, the majority of them perform better,��� Rapport said. ���They have to move to maintain alertness.���

By contrast, the children in the study without ADHD also moved more during the cognitive tests, but it had the opposite effect: They performed worse.

In addition to Rapport, the study was co-authored by Dustin Sarver of the University of Mississippi Medical Center, Michael Kofler of Florida State University, Lauren Friedman of the 91勛圖厙, and Joe Raiker of Florida International University.