Cited by 49Dementia and Cognitive Impairment ResearchPhysical Activity and HealthAlzheimer's disease research and treatments

Brain Glucose Metabolism, Cognition, and Cardiorespiratory Fitness Following Exercise Training in Adults at Risk for Alzheimer’s Disease

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Gaitán, Julian M., Boots, Elizabeth A., Dougherty, Ryan J., Oh, Jennifer M., Ma, Yue, Edwards, Dorothy F., Christian, Bradley T., Cook, Dane B. +1 more·2019·Brain Plasticity

Abstract

Aerobic exercise has been associated with reduced burden of brain and cognitive changes related to Alzheimer’s disease (AD). However, it is unknown whether exercise training in asymptomatic individuals harboring risk for AD improves outcomes associated with AD. We investigated the effect of 26 weeks of supervised aerobic treadmill exercise training on brain glucose metabolism and cognition among 23 late-middle-aged adults from a cohort enriched with familial and genetic risk of AD. They were randomized to Usual Physical Activity (PA) or Enhanced PA conditions. Usual PA received instruction about maintaining an active lifestyle. Enhanced PA completed a progressive exercise training program consisting of 3 sessions of treadmill walking per week for 26 weeks. By week seven, participants exercised at 70– 80% heart rate reserve for 50 minutes per session to achieve 150 minutes of moderate intensity activity per week in accordance with public health guidelines. Before and after the intervention, participants completed a graded treadmill test to assess VO 2 peak as a measure of cardiorespiratory fitness (CRF), wore an accelerometer to measure free-living PA, underwent 18 F-fluorodeoxyglucose positron emission tomography imaging to assess brain glucose metabolism, and a neuropsychological battery to assess episodic memory and executive function. VO 2 peak increased, sedentary behavior decreased, and moderate-to-vigorous PA increased significantly in the Enhanced PA group as compared to Usual PA. Glucose metabolism in the posterior cingulate cortex (PCC) did not change significantly in Enhanced PA relative to Usual PA. However, change in PCC glucose metabolism correlated positively with change in VO 2 peak. Executive function, but not episodic memory, was significantly improved after Enhanced PA relative to Usual PA. Improvement in executive function correlated with increased VO 2 peak. Favorable CRF adaptation after 26 weeks of aerobic exercise training was associated with improvements in PCC glucose metabolism and executive function, important markers of AD.

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  1. [26]ACSM’s Guidelines for Exercise Testing and Prescription (Tenth Edition) 10th ed Wolters Kluwer; 2018.

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Authors
Gaitán, J. M., Boots, E. A., Dougherty, R. J., Oh, J. M., Ma, Y., Edwards, D. F., Christian, B. T., Cook, D. B., & Okonkwo, O. C.
Affiliations
  • University of Wisconsin–Madison (US)
  • University of Wisconsin System (US)
Corresponding author
Okonkwo, Ozioma C.
Venue
Brain Plasticity
Publisher
IOS Press
Published
2019-06
Volume
5
Issue
1
Pages
83-95
ISSN
  • 2213-6304 (ISSN-L)
  • 2213-6312
OpenAlex
W2995954588
Cited by
49
References
76
Citations by year
2026: 1 · 2025: 9 · 2024: 9 · 2023: 11 · 2022: 10 · 2021: 5 · 2020: 3 · 2019: 1
FWCI
3.78
Type
journal article
Language
en
Open access
Locations
  • Brain Plasticity (publishedVersion, cc-by-nc)
  • PubMed Central (publishedVersion, cc-by-nc)
  • PubMed (publishedVersion)
Funders
  • Alzheimer's Association (R01 AG027161)
  • Extendicare Foundation
  • National Institutes of Health (AG027161, AG033514)
  • National Institute on Aging (AG027161, F31AG062009, RF1AG027161, AG-033514, P50AG033514, K23AG045957, AG045957, R01AG027161)
  • National Center for Research Resources (UL1RR025011)
  • Eunice Kennedy Shriver National Institute of Child Health and Human Development (U54HD090256)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Health Sciences › Medicine › Physiology › Physical Activity and Health
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
Alzheimer's disease risk, aerobic exercise training, brain glucose metabolism, cardiorespiratory fitness, executive function, episodic memory, posterior cingulate cortex, peak oxygen uptake, sedentary behavior, moderate-to-vigorous physical activity, treadmill walking, 18F-FDG PET

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