PURPOSE: Survivors of a pediatric suprasellar tumor may suffer from hypothalamic-pituitary dysfunction (HD), which may result in hypothalamic obesity (HO). The first step in HO treatment is lifestyle intervention (e.g. exercise). Our aim was to assess physical activity (PA), health-related fitness (HRF) and physical performance (PP) in a cohort of children with a suprasellar tumor. METHODS: Retrospective study on a national cohort including all children with a suprasellar tumor who were referred to the physiotherapy department 2018-2022. Data was collected on: PA defined as minutes of Moderate-to-Vigorous Physical Activity (MVPA) and number of steps per day, HRF defined as body composition, VO RESULTS: Seventy-three children (mean age 11.09, mean body mass index SDS 2.36) were evaluated. In total, 24.1% reached the guideline of ≥ 60 min MVPA per day. The VO