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Voss, Michelle W.; Heo, Susie; Prakash, Ruchika S.; Erickson, Kirk I.; Alves, Heloisa; Chaddock, Laura; Szabo, Amanda N.; Mailey, Emily L.; Wójcicki, Thomas R.; White, Siobhan M.; Gothe, Neha; McAuley, Edward; Sutton, Bradley P.; Kramer, Arthur F.
Human brain mapping, November 2013, Letnik: 34, Številka: 11Journal Article
Cerebral white matter (WM) degeneration occurs with increasing age and is associated with declining cognitive function. Research has shown that cardiorespiratory fitness and exercise are effective as protective, even restorative, agents against cognitive and neurobiological impairments in older adults. In this study, we investigated whether the beneficial impact of aerobic fitness would extend to WM integrity in the context of a one‐year exercise intervention. Further, we examined the pattern of diffusivity changes to better understand the underlying biological mechanisms. Finally, we assessed whether training‐induced changes in WM integrity would be associated with improvements in cognitive performance independent of aerobic fitness gains. Results showed that aerobic fitness training did not affect group‐level change in WM integrity, executive function, or short‐term memory, but that greater aerobic fitness derived from the walking program was associated with greater change in WM integrity in the frontal and temporal lobes, and greater improvement in short‐term memory. Increases in WM integrity, however, were not associated with short‐term memory improvement, independent of fitness improvements. Therefore, while not all findings are consistent with previous research, we provide novel evidence for correlated change in training‐induced aerobic fitness, WM integrity, and cognition among healthy older adults. Hum Brain Mapp 34:2972–2985, 2013. © 2012 Wiley Periodicals, Inc.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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