Paul Freudenberger1, Katja Petrovic1, Abhijit Sen1, Anna Maria Töglhofer1, André Fixa1, Edith Hofer1, Sabine Perl1, Robert Zweiker1, Sudha Seshadri1, Reinhold Schmidt1, Helena Schmidt2. 1. From the Institute of Molecular Biology and Biochemistry, Center for Molecular Medicine (P.F., A.M.T., A.F., H.S.), Department of Neurology (K.P., E.H., R.S., H.S.), Institute for Medical Informatics, Statistics and Documentation (E.H.), and Department of Cardiology (S.P., R.Z.), Medical University of Graz, Austria; Department of Public Health and General Practice (A.S.), Faculty of Medicine, Norwegian University of Science and Technology, Norway; and Department of Neurology (S.S.), Boston University School of Medicine, MA. 2. From the Institute of Molecular Biology and Biochemistry, Center for Molecular Medicine (P.F., A.M.T., A.F., H.S.), Department of Neurology (K.P., E.H., R.S., H.S.), Institute for Medical Informatics, Statistics and Documentation (E.H.), and Department of Cardiology (S.P., R.Z.), Medical University of Graz, Austria; Department of Public Health and General Practice (A.S.), Faculty of Medicine, Norwegian University of Science and Technology, Norway; and Department of Neurology (S.S.), Boston University School of Medicine, MA. helena.schmidt@medunigraz.at.
Abstract
OBJECTIVE: To investigate whether greater cardiorespiratory fitness is associated with better global and domain-specific cognitive function. METHODS: We investigated 877 participants (aged 65 ± 7 years, 55% women) of the Austrian Stroke Prevention Study. For cardiorespiratory fitness, the maximum oxygen consumption (V̇o2max) was calculated based on weight and maximum and resting heart rate on a treadmill test (mL·kg(-1)·min(-1)). A test battery assessing memory (Bäumler's Lern-und Gedächtnistest), executive function (Wisconsin Card Sorting Test, Trail Making Test-Part B, Digit Span Backward, Alters Konzentrationstest, a computerized complex reaction time task) and motor skills (Purdue Pegboard Test) was administered. Summary measures for cognitive domains and for global cognition were calculated. White matter lesions, lacunes, and brain atrophy were assessed using MRI. RESULTS: Higher V̇o2max was associated with better global (B = 0.024; p = 0.000) and domain-specific cognitive function (memory B = 0.026, p = 0.000; executive function B = 0.009, p = 0.003; motor skills B = 0.012, p = 0.018) after adjustment for age, sex, education years, and Ca(2+) channel antagonists or β-blockers. White matter lesions, lacunes, or brain atrophy did not mediate the effect (p > 0.05 for all mediators). The interactions of V̇o2max with age, overweight, and APOE ε4 on cognition were not statistically significant (p > 0.05 for all interaction terms) with the exception of a modulating effect of body mass index on V̇o2max in the memory domain. CONCLUSIONS: Higher V̇o2max is associated with better global cognitive function and with better performance in the cognitive domains of memory, executive function, and motor skills in the middle-aged and elderly. The association is not mediated by the presence of white matter lesions, lacunes, and brain atrophy.
OBJECTIVE: To investigate whether greater cardiorespiratory fitness is associated with better global and domain-specific cognitive function. METHODS: We investigated 877 participants (aged 65 ± 7 years, 55% women) of the Austrian Stroke Prevention Study. For cardiorespiratory fitness, the maximum oxygen consumption (V̇o2max) was calculated based on weight and maximum and resting heart rate on a treadmill test (mL·kg(-1)·min(-1)). A test battery assessing memory (Bäumler's Lern-und Gedächtnistest), executive function (Wisconsin Card Sorting Test, Trail Making Test-Part B, Digit Span Backward, Alters Konzentrationstest, a computerized complex reaction time task) and motor skills (Purdue Pegboard Test) was administered. Summary measures for cognitive domains and for global cognition were calculated. White matter lesions, lacunes, and brain atrophy were assessed using MRI. RESULTS: Higher V̇o2max was associated with better global (B = 0.024; p = 0.000) and domain-specific cognitive function (memory B = 0.026, p = 0.000; executive function B = 0.009, p = 0.003; motor skills B = 0.012, p = 0.018) after adjustment for age, sex, education years, and Ca(2+) channel antagonists or β-blockers. White matter lesions, lacunes, or brain atrophy did not mediate the effect (p > 0.05 for all mediators). The interactions of V̇o2max with age, overweight, and APOE ε4 on cognition were not statistically significant (p > 0.05 for all interaction terms) with the exception of a modulating effect of body mass index on V̇o2max in the memory domain. CONCLUSIONS: Higher V̇o2max is associated with better global cognitive function and with better performance in the cognitive domains of memory, executive function, and motor skills in the middle-aged and elderly. The association is not mediated by the presence of white matter lesions, lacunes, and brain atrophy.
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