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Effects of Cognitive Training in Flanker Task on Mobility of Older Adults: A Randomized Controlled Trail
Yu Liu1,2, Man Zheng3, Jianxiu Liu3
1Department of Psychology, Guizhou Minzu University, Guiyang, China.
Introduction:
Cognitive function is considered to be correlated with the older adults' mobility. Flanker task, reflecting the conflict resolution, is barely explored as a simple approach to train the older adults' cognitive function. Hence, the first aim of this study was to explore the effect of cognitive intervention adopting flanker task on mobility. The second aim of this study was to assess the effect of cognitive training by comparing it with physical training to disclose how much dosage of cognitive training can have the equal improvement of mobility with physical training.
Methods:
232 older adults (age, mean ± SD: 66.16 ± 7.08, female: 74.3%) were retrained and assigned into three groups (cognitive intervention group, physical exercise intervention group, and control group). The intervention lasted for 22 weeks (cognitive intervention: flanker task, 30 min per session, 3 sessions a week; physical exercise intervention: 30 min muscle and balance training session, twice a week, and 30 min daily walking and housework, 2-4 times a week). Grip strength, 30-s chair-stand test, single leg balance with eyes closed, and the timed "Up & Go" (TUG) were used as indicators of mobility. A mixed model analysis of variance (ANOVA), interaction effect, and simple effect were performed in statistical analysis.
Results:
Both intervention groups improved mobility, and the results were similar behaviorally. However, the exercise intervention group performed better in 30-s chair-stand test (25.14 ± 0.67 vs. 23.71 ± 0.76 with p = 0.01) and single leg balance with eyes closed (8.15 ± 0.69 vs. 6.14 ± 0.43 with p < 0.001).
Conclusion:
22-week cognitive intervention (for total 1,980 min) could improve the older adults' mobility to the similar extent of mild-to-moderate physical exercises (1,320 min of functional muscle and balance training and 1,980 daily physical activities), which ascertained the far transfer effects from cognition to untrained mobility domain and found a comparable dosage of cognitive and physical exercise training.
