Moon RC - This investigation aimed to uncover the relationships between late adiposity rebound (at or after 7.0 years of age) and the probability of developing and reversing obesity during elementary school years. Weighted extended Cox hazard models were utilized to assess the probability of developing and reversing obesity (cut-offs for extended models were 6 and 12 months after kindergarten entry, respectively) using nationally representative cohorts from Early Childhood Longitudinal Studies, Kindergarten Class of 1998-1999 and 2010-2011. Within 6 months, the risk of developing obesity was 73% and 76% lower for boys with late adiposity rebound than their classmates without late adiposity rebound, among children with obesity at kindergarten entry. A similar connection was noted for both boys and girls six months after entering kindergarten. Within 12 months, the likelihood of reversing obesity was 52% and 54% higher for boys with late adiposity rebound than their peers without late adiposity rebound, among children without obesity at kindergarten entry. Twelve months after entering kindergarten, the possibility of reversing obesity with late adiposity rebound among both genders was 6-8 times that of rebounding among children without late adiposity. Findings suggested a significant association of late adiposity rebound with a reduced risk of developing obesity and an increased likelihood of reversing obesity among kindergarteners.