Eike Boll presented the cooperation project between the Institute of Sports Science and the Department of Paediatric Haematology and Oncology as part of the lunchtime training course - a series of training sessions at the University Hospital for paediatric doctors and anyone interested. The focus was particularly on the snow sports project and its development in recent years. The exchange with colleagues from the clinic was very beneficial for the perspective of the overall project, which also offers various water sports and a climbing and bouldering programme for children and young people with cancer. Once again, the multi-professional orientation of the project became clear: in addition to doctors from the various paediatric disciplines, the training also involved specialists from the fields of sports, occupational and physiotherapy.