A Combined Intervention of Aerobic Exercise and Video Game in Older Adults: The Efficacy and Neural Basis on Improving Mnemonic Discrimination

Xiaoyu Cui, Wenjun Gui, Jingwen Miao, Xiaomei Liu, Xinyi Zhu, Zhiwei Zheng, Wenyu Wan, Qi Shao, Jutta Kray, Yang Jiang, Juan Li

Research output: Contribution to journalArticlepeer-review

1 Scopus citations

Abstract

BACKGROUND: Mnemonic discrimination is very vulnerable to aging. Previous studies have reported that aerobic exercise and enriched cognitive stimulation (e.g., video games) could improve mnemonic discrimination in older adults. The animal model suggested that combining the 2 training methods could result in a larger improvement. However, there is limited evidence on the potential superior efficacy of combined intervention with human participants. Moreover, the neural basis of this potential superior is poorly understood. METHODS: We conducted a 16-week intervention trial with 98 community-dwelling older adults assigned to one of the four groups (combined training, aerobic cycling alone, video game alone, or passive control). Mnemonic discrimination was measured as the primary behavioral outcome, hippocampal volume, and functional connectivity of the default mode network (DMN) were measured as neural indicators. RESULTS: Participants receiving the combined intervention demonstrated the largest effect size of mnemonic discrimination improvement. Magnetic resonance image results indicated aerobic exercising increased left hippocampal volume, while video-game training counteracted the decline of DMN functional connectivity with aging. The synergy of hippocampal structural and functional plasticity observed in the combined training group explained why the largest intervention benefits were obtained by this group. CONCLUSION: Despite the nonrandomized design (i.e., likely self-selection bias), our results provide new evidence that combined intervention of exercise and cognitive training is more effective than single intervention for older adults. Parallel to animal studies, aerobic exercise and the video game with enriched cognitive stimulation could induce hippocampal plasticity through separate structural and functional pathways. CLINICAL TRIALS REGISTRATION NUMBER: ChiCTR1900022702.

Original languageEnglish
Pages (from-to)1436-1444
Number of pages9
JournalJournals of Gerontology - Series A Biological Sciences and Medical Sciences
Volume78
Issue number8
DOIs
StatePublished - Aug 2 2023

Bibliographical note

Publisher Copyright:
© The Author(s) 2022. Published by Oxford University Press on behalf of The Gerontological Society of America. All rights reserved. For permissions, please e-mail: journals.permissions@oup.com.

Keywords

  • Cycling
  • Default mode network
  • Hippocampus
  • MRI

ASJC Scopus subject areas

  • General Medicine

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