2020 年４月，緊急事態宣言が発令され，人々は不要不急以外の外出が不可能となった。緊急事態宣言による活動自粛により人々の活動は大幅に低下すると報告されている。しかし，緊急事態宣言から６カ月以上経過し，身体活動量がどの程度変化したか不明である。緊急事態宣言時および宣言から６カ月経過時の身体活動量を比較した。
方法：対象は広島市に在住の 13 名の高齢者である。2020 年４月および 10 月，３軸加速度計付き活動量計を腰に装着し，１週間身体活動量および身体機能を測定した。
結果：活動自粛時に比べ，活動自粛６カ月経過時において，歩数，活動時間，中強度活動量，総活動量が向上した（≦17％）。
結語：緊急事態宣言などの活動自粛から６カ月経過し，高齢者における身体活動量は改善を認めた。心血管イベントなどの発生リスクを抑えるため，感染対策に留意しつつ，日々の従事している活動や，趣味および体操などを継続し，可能な限り行う方がよい。

Since the state of emergency was declared in Japan in April 2020, people have been unable to go out except for unnecessary emergency. There are reports that people’s activities have declined significantly due to self-restraint. However, more than six months after the state of emergency was declared, it is unclear how much physical activity has changed. Therefore, we compared the amount of physical activity immediately after self-restraint and 6 months after self-restraint.
Method: The subjects are 13 elderly people living in Hiroshima City. In April and October 2020, an activity meter with a 3-axis speedometer was worn on the waist to measure physical activity and function for one week. Results: Compared to immediately after self-restraint, after 6 months of self-restraint, the number of steps, activity time, medium intensity activity, and total activity improved (≤17%).
Conclusion: The amount of physical activity of the elderly 6 months after the self-restraint due to the state of emergency was improved compared to immediately after the self-restraint.
In order to reduce the risk of cardiovascular events, it is better to continue daily activities, hobbies and exercises while paying attention to infection control measures, and to carry out as much as possible.