He specializes in sports and preventive medicine and was the medical director at Europe’s first University medical center section for preventive medicine and lifestyle medicine. Dr Sagner is a member of the European Union Platform for Action on Diet, Physical Activity and Health and partner of the European Innovation Partnership on Active and Healthy Aging.

As a clinician, Dr. Sagner has spearheaded interventions in the field of endocrinology and cardiometabolic prevention such as the use of GLP1 agonists in Europe. He is the current editor-in-chief of Progress in Preventive Medicine, a peer reviewed journal for P4 medicine--a new approach that is predictive, preventive, personalized and participatory, known as P4--and systems biology-based prevention.