Rhayun Song , the senior author on the study and an assistant professor of nursing at Chungnam National University in Daejeon , South Korea , said that keeping joints and muscles moving was essential for older people , and that '' tai chi can do it without causing pain and stiffness since it 's slow circular movements without external impact . ''
South Korea
Daejeon
/location/location/contains
South Korea
Daejeon
/location/country/administrative_divisions
Daejeon
Chungnam National University
/location/location/contains
Daejeon
South Korea
/location/administrative_division/country
ORGANIZATION
Chungnam National University
LOCATION
Daejeon
LOCATION
South Korea