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Cognitive function affects trainability for physical performance in exercise intervention among older adults with mild cognitive impairment

Authors Uemura K, Shimada H, Makizako H, Doi T, Yoshida D, Tsutsumimoto K, Anan Y, Suzuki T

Received 22 October 2012

Accepted for publication 15 December 2012

Published 30 January 2013 Volume 2013:8 Pages 97—102

DOI https://doi.org/10.2147/CIA.S39434

Checked for plagiarism Yes

Review by Single-blind

Peer reviewer comments 3

Kazuki Uemura,1,3 Hiroyuki Shimada,1 Hyuma Makizako,1,3 Takehiko Doi,1 Daisuke Yoshida,1 Kota Tsutsumimoto,1 Yuya Anan,1 Takao Suzuki2

1Section for Health Promotion, Department for Research and Development to Support Independent Life of Elderly, Center for Gerontology and Social Science, National Center for Geriatrics and Gerontology, 2Research Institute, National Center for Geriatrics and Gerontology, Aichi, 3Japan Society for the Promotion of Science, Tokyo, Japan

Background: Although much evidence supports the hypothesis that cognitive function and physical function are interrelated, it is unclear whether cognitive decline with mild cognitive impairment influences trainability of physical performance in exercise intervention. The purpose of this study was to examine the association between cognitive function at baseline and change in physical performance after exercise intervention in older adults with mild cognitive impairment.
Methods: Forty-four older adults diagnosed with mild cognitive impairment based on the Peterson criteria (mean age 74.8 years) consented to and completed a 6-month twice weekly exercise intervention. The Timed Up and Go (TUG) test was used as a measure of physical performance. The Mini-Mental State Examination (MMSE), Trail Making Test Part B, Geriatric Depression Scale, baseline muscle strength of knee extension, and attendance rate of intervention, were measured as factors for predicting trainability.
Results: In the correlation analysis, the change in TUG showed modest correlations with attendance rate in the exercise program (r = -0.354, P = 0.027) and MMSE at baseline 
(r = -0.321, P = 0.034). A multiple regression analysis revealed that change in TUG was independently associated with attendance rate (ß = -0.322, P = 0.026) and MMSE score
(ß = -0.295, P = 0.041), controlling for age and gender.
Conclusion: General cognitive function was associated with improvements in physical performance after exercise intervention in subjects with mild cognitive impairment. Further research is needed to examine the effects of exercise programs designed to address cognitive obstacles in older adults with mild cognitive impairment.

Keywords: exercise, mobility, rehabilitation, Timed Up and Go test

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