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Published Online:https://doi.org/10.1026/0943-8149/a000053

Zusammenfassung. Bisherige Forschungsergebnisse deuten darauf hin, dass körperliche Aktivität zur Aufrechterhaltung der kognitiven Leistungsfähigkeit im Alter beiträgt. Welche Wirkmechanismen dabei eine Rolle spielen, ist noch nicht eindeutig geklärt. Ziel dieser Studie ist es, die Bedeutung der kardiovaskulären Fitness, der Kraftleistung sowie der Depressivität als Mediatoren zwischen körperlicher Aktivität und verschiedenen fluiden kognitiven Fähigkeiten im Alter unter Anwendung von Strukturgleichungsmodellen zu untersuchen. N = 208 Probanden (83 männlich) im Alter zwischen 60 und 80 Jahren wurden im Rahmen einer Querschnittserhebung untersucht. Die Ergebnisse zeigen, dass eine hohe körperliche Aktivität im Alter mit einer hohen kardiovaskulären Fitness und Kraftleistung, sowie einer geringen Depressivität einhergeht. Eine hohe kardiovaskuläre Fitness sowie eine hohe Kraftleistung gehen wiederum mit einer hohen Verarbeitungsgeschwindigkeit und einer hohen Leistung im logischen Schlussfolgern und räumlichen Vorstellen einher. Eine hohe Kraftleistung weist darüber hinaus einen positiven Zusammenhang zur verbalen Gedächtnisleistung auf. Zwischen dem Ausmaß der Depressivität und der kognitiven Leistung konnten hingegen keine Zusammenhänge nachgewiesen werden. Die Ergebnisse deuten darauf hin, dass eher Indikatoren der körperlichen Fitness als psychologische Wirkmechanismen den Zusammenhang zwischen körperlichen Aktivität und kognitiven Fähigkeiten im Alter erklären könnten. Implikationen für Forschung und Praxis werden diskutiert.


The relationships between physical activity and cognitive performance in older adults: Mediating effects of fitness and depression

Abstract. Recent research has shown that physical activity contributes to the maintenance of cognitive functioning in old age. However, it has not yet been fully understood which mechanisms are responsible for that relationship. On the basis of structural equation modelling the objective of this study is to examine the role of cardiovascular fitness, strength, and depression as mediators between physical activity and several fluid cognitive abilities. N = 208 participants (83 males) between 60 and 80 years were tested with a cross sectional design. Results show that a higher level of physical activity is related to a higher level of cardiovascular fitness and strength and also to a lower level of depression. Both a higher level of cardiovascular fitness as well as strength are, in turn, related to higher performance levels with respect to processing speed, reasoning, and spatial relations. Additionally, a higher level of strength is positively related to verbal memory performance. However, there are no relations between the level of depression and cognitive performance. These results suggest that the indicator of physical fitness rather than psychological mechanisms might explain the relation between physical activity and cognitive functioning in old age. Implications for research and practice are discussed.

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