Among the sequelae of COVID-19, patients who are at least tired and who meet all of the following selection criteria are targeted.1) Those who have been diagnosed with a new coronavirus infection within 6 months before obtaining consent2) Men and women aged 20 to 75 at the time of consent3) Those who have a feeling of fatigue after COVID-19 infection with VAS of 40 mm or more at Day 04) Those who can use smart watches and smartphone applications5) Those who have voluntarily consented to the document

Among the sequelae of COVID-19, patients who are at least tired and who meet all of the following selection criteria are targeted.1) Those who have been diagnosed with a new coronavirus infection within 6 months before obtaining consent2) Men and women aged 20 to 75 at the time of consent3) Those who have a feeling of fatigue after COVID-19 infection with VAS of 40 mm or more at Day 04) Those who can use smart watches and smartphone applications5) Those who have voluntarily consented to the document