Berse, Timo ; Rolfes, Kathrin ; Barenberg, Jonathan ; Dutke, Stephan ; Kuhlenbäumer, Gregor ; Kuhlenbäumer, G. ; Völker, Klaus ; Winter, Bernward ; Wittig , Michael; Knechtel, Stefan: Acute physical exercise improves shifting in adolescents at school: evidence for a dopaminergic contribution