"young children rarely get the activity they need"

http://www.timeslive.co.za/lifestyle/family/2012/10/17/three-hours-of-daily-exercise-advised-for-kids-under-six

Three hours of daily exercise advised for kids under six

AFP Relaxnews | 17 October, 2012 15:20

While it's been previously thought that young children need a minimum of one hour of physical activity a day, researchers now advise three hours of exercise for children under six, spread out over the course of the day.

"US researchers have cited that major organizations in three countries, Australia, the UK, and the US, have stated in recent years that three hours of daily exercise is optimal for children under six. Their commentary was published in the journal Archives of Pediatrics & Adolescent Medicine on Monday.

The new guidelines are partly in response to the soaring obesity rates among young children. For example, 26.7% of US children between the ages of two and five are obese or overweight, researchers Russell Pate and Jennifer O'Neill, of the University of South Carolina, wrote.

Plus, studies have shown that young children rarely get the activity they need. According to studies using accelerometers (wristwatch-like devices that measure physical activity), preschool-age kids get only sporadic exercise, with very little of it vigorous."