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Xiuxiu Huang1, Shifang Zhang2, Xiaoyan Zhao2

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This study found that both aerobic exercise (AE) and resistance exercise (RE) show positive dose-response relationships with cognitive function in older adults with mild cognitive impairment. These findings support personalized exercise programs for maximizing cognitive benefits.

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Area of Science:

  • Neuroscience
  • Gerontology
  • Exercise Physiology

Background:

  • Individualized exercise programs require understanding exercise-cognition dose-response relationships.
  • Mild cognitive impairment (MCI) affects older adults, necessitating interventions to maintain cognitive function.

Purpose of the Study:

  • To investigate the dose-response relationships between aerobic exercise (AE) and resistance exercise (RE) and cognitive function in older adults with MCI.
  • To identify potential moderators influencing these exercise-cognition relationships.

Main Methods:

  • Secondary analysis of a three-arm randomized controlled trial involving older adults with MCI.
  • Participants were randomized into AE, RE, or control groups with remotely supervised training.
  • Cognitive functions were assessed pre- and post-intervention, with exercise dose recorded for dose-response analysis.

Main Results:

  • Positive dose-response relations were observed between AE and global cognition (p=0.051) and between RE and processing speed (p=0.003).
  • Moderators for AE included age, BMI, physical activity, and comorbidities.
  • Moderators for RE included age, gender, BMI, and sleep duration.

Conclusions:

  • Distinct exercise types demonstrate positive dose-response effects on cognitive function.
  • Personalized exercise prescriptions can be informed by identified moderators to optimize cognitive benefits in older adults with MCI.