A study by researchers from Monash University says that kids who are active throughout the day sleep more soundly at night and in fact fall asleep faster.
The study involved 500 children and the researchers found that for every hour of inactivity, kids take three minutes longer to fall asleep at night. On an average kids in the study took 26 minutes to fall asleep with most of them sleeping within 45 minutes.
"As short sleep duration is associated with obesity and lower cognitive performance, community emphasis on the importance of promoting healthy sleep in children is vitally important," the researchers wrote. "This study emphasises the importance of physical activity for children, not only for fitness, cardiovascular health and weight control, but also for sleep."