The new guidelines are partly in response to the soaring obesity rates among young children. For example, 26.7 percent 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. For children under six, experts generally advise a combination of light activity and energetic activity throughout the day.
The experts listed a number of activities that qualify for both the "light" and "energetic" categories, including walking, dancing, skipping rope, and hide-and-seek type games.
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