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Dr. Hill said the W.H.O. seems to be "apply the precautionary principle and say," If we do not know it's good, and there is reason to believe it's bad, why do it? "
A.A.P. is starting to consider the next set of guidelines, Dr. Hill said.
"It's certainly possible as we review our recommendations and new data becomes available, so we could skew that direction in the future," he said. "But it's hard to say without a comprehensive literature review, which is the basis of our policy."
The World Health Organization guidelines go beyond the recommendations of the A.A.P.
Dr. Fiona Bull, program manager for the surveillance and prevention of noncommunicable diseases in the OHW population, led a team of experts who developed the guidelines.
"Improving physical activity, reducing sedentary periods and ensuring quality sleep in young children will improve their physical and mental health and well-being and help prevent childhood obesity and illness." associated later in life, "said Dr. Bull in a statement.
The researchers also recommended that children under 5 years old should not be strapped into a stroller or high chair, or tied to the back of the health care provider for more than an hour at a time. And children aged 1 to 5 years old should do three hours of physical activity a day and sleep at least 10 hours a night.
According to WHO, the number of obese people in the world has nearly tripled since 1974. Childhood obesity, once considered a scourge for rich countries, is increasing dramatically in low- and middle-income countries. especially those from Africa and Asia.
The organization said that non-compliance with current recommendations for physical activity is responsible for more than five million deaths worldwide each year, in all age groups.
"What we really need is to bring back play for children," said Dr. Juana Willumsen, who works on childhood obesity issues at W.H.O. "It's about going from sedentary to recess while protecting sleep."
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