inclusion criteria: spo2 ≥ 93% their age ranges from 30-40 years old. copd patients gold1 (mild fev1≥80% predicted) and gold2 (moderate 50% ≤fev1<80%predicted) (manian, 2019) patients diagnosed as post covid-19 pneumonia between 3 and 6 months ago with ct scan and pcr testing. their body mass index (bmi) ranged from 20 to 29.9kg/m2. stable medical cases with dyspnea

inclusion criteria: spo2 ≥ 93% their age ranges from 30-40 years old. copd patients gold1 (mild fev1≥80% predicted) and gold2 (moderate 50% ≤fev1<80%predicted) (manian, 2019) patients diagnosed as post covid-19 pneumonia between 3 and 6 months ago with ct scan and pcr testing. their body mass index (bmi) ranged from 20 to 29.9kg/m2. stable medical cases with dyspnea