Prime Archives in Environmental ResearchPhysical Activity Changes and Its Risk Factors among Community-Dwelling Japanese Older Adults during the COVID-19 Epidemic Associations with Subjective Well-BeingDownloadPhysical-Activity-Changes-and-Its-Risk-Factors-among-Community-Dwelling-Japanese-Older-Adults-during-the-COVID-19-Epidemic-Associations-with-Subjective-Well-Being