Inclusion Criteria:  Female. Age from 20 to 30 years old. - Body mass index (BMI) 19 to 24 kg/m2.- Non-smoker- Recovered from COVID-19 over the past 12 months. - They are experiencing mild to moderate symptoms without any complications. - Able to use online communication programs.  Exclusion Criteria:  - Anyone who does regular physical exercise. history of acute illness, asthma, pulmonary fibrosis, hypertension, diabetes disease. hypoxemia in rest.