OUTSIDE: OUTdoor Swimming as a nature-based Intervention for DEpression: a feasibility randomised controlled trial - Massey, H; Denton, H; Burlingham, A; Violato, M; Bibby-Jones, A-M; Cunningham, R; Ciccognani, S; Robertson, S; Jhans, A; Pollard, J; Yu, S; Strauss, C (Mental Health and Physical Activity, 2025)