Textbox 2 – Classification of the cognitive-motor intervention Cognitive-motor interventions are also referred to as dual-task (DT) interventions, which require the simultaneous conduction of a mental and a physical task, e.g. walking while counting backwards [8]. Wollesen and Voelcker-Rehage [8] subdivided dual-tasking into different categories in regard to the comparison of training and assessment method:  • A General dual-task training (GDT) describes an intervention which uses different unspecific training tasks in comparison to the assessment tasks  • During Specific dual-task training (SDT) the intervention consists of training tasks that addresses a comparable cognitive dimension as the assessment task In line with these classifications  • A General dual-task exergame (GDT-EX) describes an exergame intervention which uses different unspecific training tasks in comparison to the assessment tasks A Specific dual-task exergame (SDT-EX) intervention consists of training tasks that address a comparable cognitive dimension as the assessment task