Exergame-Based Training to Promote Mobility and Cognitive Function in Older Adults: A Proof-of-Concept Study. - J., Massing; E., Andac; A., Turki; E., Koutsompina-Szedlak; R., Schulz; K., Brixius (German Journal of Sports Medicine / Deutsche Zeitschrift fur Sportmedizin, 2026)