Optimizing cardiorespiratory fitness after bariatric surgery – highly effective with very low adherence: HIT BAR randomized controlled trial. - Finze, Alida; Duddek, Megan; Hetjens, Svetlana; Ghanad, Erfan; Reissfelder, Christoph; Otto, Mirko; Betzler, Johanna; Joisten, Christine; Blank, Susanne (BMC Sports Science, Medicine & Rehabilitation, 2025)