A new study finds a weight problem can begin in children as young as 5 years old. Researchers at Emory University looked at childhood obesity among nearly 8,000 kids 5 to 14 years old.
They found when children entered kindergarten at 5 years old, 12 percent were obese and another 15 percent were overweight. The annual incidence of obesity dropped between kindergarten and eighth grade, but overweight five-year olds were four times as likely as normal-weight children to become obese.
Among children who became obese between 5 and 14 years old, nearly half had been overweight and 75 percent had been above the 70th percentile for body-mass index when the study began.