40 COPD men will be divided to exercise group (20 patients) and control group (20 patients):~the exercise group will receive a exercise session contains a fifty minutes exercise training at home with moderate intensity on the available training devices as bicycle or treadmill in addition to 30 minutes of exercising of upper and lower limb, the session will be repeated three times per week for eight weeks.~The control group will not be trained
exercise activity during the COVID pandemic is appreciated to be conducted in home especially for chronic chest diseases as chronic obstructive pulmonary disease (COPD) to reduce the chance of viral contamination during the COVID-19 pandemic.