Self-quarantine people have a morning gym organised by health volunteers amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)

Self-quarantine people have a morning gym organised by health volunteers amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)

Self-quarantine people have a morning gym organised by health volunteers amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)

Self-quarantine people have a morning gym organised by health volunteers amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)

A paramedic wearing protective suit attends a morning gym organised by health volunteers amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)

Health volunteers perform morning gym for self-quarantine people amid the COVID-19 outbreak at a quarantine site in Tangerang, Indonesia, May 26, 2020. (Xinhua/Agung Kuncahya B.)