Abstract
The purpose of this study was to clarify the effect of daily physical activity on maintaining mobility in the elderly. The subjects were residents (between 65 and 84 years old) in Shizuoka Prefecture. The first survey was carried out with a questionnaire composed of physical independency and daily physical activity in 1999 (1st survey). The second survey was carried out with the same questionnaire 3 years later in 2002 (2nd survey), and 11,462 people who returned both of them were analyzed. The difference from the 1st survey to the 2nd survey was evaluated on the changes of mobility. In addition we applied logistic regression analysis to evaluate the influence of mobility changes (independent variable) on daily physical activity (dependent variable). The analysis showed that the daily physical activity influenced the change of mobility. Among the daily physical activity, walk speed was the most influenced the changes of mobility. These results indicate that the daily physical activity was important in the maintaining mobility in the elderly.
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