A round of morning exercises could quiet a child's attention deficit hyperactivity disorder (ADHD) symptoms, according to a recent study.

Researchers from Michigan State University and the University of Vermont found that exercising before school could help children reduce symptoms of ADHD in the classroom and at home, Medical Daily reported. Signs of ADHD can include inattentiveness, moodiness and difficulty getting along with others.

"Early studies suggest that physical activity can have a positive effect on children who suffer from ADHD," Alan Smith, co-researcher and chairperson of Michigan State University's kinesiology department, said in a statement. "This gives schools one more good reason to incorporate physical activity into the school day."

For the study, the research team studied about 200 early elementary school students ranging from kindergarten to second grade that either exhibited signs of ADHD or didn't.

During the trial, students were randomly selected to participate in a group that completed moderate to vigorous physical activity each day before school for 12 weeks, or a group that completed more sedentary classroom-type activities.

"Although our findings indicated that all participants showed improvements, children with ADHD risk receiving exercise benefited across a broader range of outcomes than those receiving the sedentary activities," Smith said.

Smith said further studies are needed to better understand the frequency and amount of physical activity that can provide benefits to children and added that the effects of exercise may be different based on a child's age.

"Despite the number of remaining questions, physical activity appears to be a promising intervention method for ADHD with well-known benefits to health overall," he said.

The findings were recently published in the Journal of Abnormal Child Psychology.