A young girl walks with her mother along a sidewalk in Des Plaines, Illinois. The obesity rate among American children and teenagers may have stabilized after a dramatic rise in the 1980s and 1990s that has been described as an epidemic, according to a study in The Journal of the American Medical Association.(AFP/Getty Images/File/Tim Boyle)AFP - The obesity rate among American children and teenagers may have stabilized after a dramatic rise in the 1980s and 1990s that has been described as an epidemic, according to a US study on Wednesday.