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  "path": "/news/2026-04-decades-obesity-theory-body-composition.html",
  "publishedAt": "2026-04-16T18:00:10.000Z",
  "site": "https://medicalxpress.com",
  "textContent": "In new research being presented at the European Congress on Obesity in Istanbul, Turkey (12–15 May) and published in The Journal of Nutrition, a 42-year-old theory as to why children's body mass index (BMI) decreases post-infancy before then rising continuously from age 6 years—\"the adiposity rebound\"—is refuted using new analyses—rather than decreasing body fat, the real reason is proposed as increasing muscle mass.",
  "title": "New research challenges 4-decades old obesity theory as to why and how body composition varies in young children"
}