@article{oai:bunka.repo.nii.ac.jp:00000122,
 author = {安永, 明智 and 木村, 憲},
 journal = {第25回健康医科学研究助成論文集},
 month = {Mar},
 note = {The purpose of the present study was to examine associations between the quantity and quality of habitual physical activity and cognitive function in older people. Participants included 29 males (mean age, 73 years) and 42 females (mean age, 69 years) who were free-living healthy Japanese adults. We measured accelerometer step counts and their metabolic equivalents WETS) for 4 weeks. At the end of the 4 weeks and after 6 months, cognitive function was assessed with the Mini Mental State Examination (MMSE) , Benton Visual Retention Test, and Task-switch reaction time test. Physical activity was divided according to the month-averaged daily step count (＜7500, 7500-9999, and ≧10000 steps/day) and the month-averaged daily duration of activity (moderate-activity duration ＜30.0 and ≧30.0 min/day). In a longitudinal analysis, cognitive function assessed by Benton Visual Retention Test scores was poorer in the lowest step-count group (＜7500 steps/day). Similarly, a longitudinal analysis showed that Task-switch reaction time test scores of participants undertaking moderate-activity (≧30.0 min/day) were significantly better compared with individuals with lower activity time (＜30.0 min/day) after controlling for age and sex. In terms of the MMSE score, after controlling for age and sex, ANCOVA analysis of both cross-sectional and longitudinal data showed no significant associations between physical activity and MMSE score. These results suggest the importance of both the intensity and volume of physical activity for maintaining cognitive function in older individuals, as assessed by the Benton Visual Retention Test and Task-switch reaction time test.},
 pages = {129--136},
 title = {高齢者の認知機能と運動・身体活動の関係 : 前向き研究による検討},
 year = {2010}
}