Inclusion Criteria:  Inclusion criteria for individuals diagnosed with COVID-19 (Pinho,2020):  Individuals between the ages of 20-30 Individuals who were diagnosed with COVID-19 positive in the last 3-10 months and were treated with home isolation and whose last PCR test was negative Individuals who had not to get vaccinated Individuals whose physical activity level is between 600-3000 MET min/week according to "International Physical Activity Questionnaire-Short form (IPAQ-SF)" (sedentary)  Inclusion criteria of healthy individuals (Control group):  Individuals between the ages of 20-30 Individuals who have not been diagnosed with COVID-19 positive Individuals who had not to get vaccinated Individuals whose physical activity level is between 600-3000 MET min/week according to the IPAQ-SF (sedentary)  Exclusion Criteria:  Individuals who are hospitalized and treated for COVID-19 Individuals with previously diagnosed Chronic Obstructive Pulmonary Disease (COPD), heart disease, and/or rheumatic diseases Individuals who have had surgery in the last six months