American Society for Nutrition Apr 16 2026 A new study published in The Journal of Nutrition , a peer-reviewed journal of the American Society for Nutrition, offers new insights into a decades-old puzzle in childhood obesity. The study found that while body mass index (BMI) starts to rise in early childhood during a stage known as adiposity rebound, when BMI increases after an initial decline, the waist-to-height ratio, a measure that better reflects body fat, continues to drop. This suggests