Background: Worldwide, cardiovascular diseases are the main cause of death, accounting for 25 to 45 percent of all fatalities. Low levels of physical activity pose a serious risk to cardiovascular health. Aim of the study was to determine the physical activity in patients undergoing coronary artery bypass graft surgery. Methods: A hospital-based cross-sectional study was conducted among 210 patients attending cardiothoracic outpatient clinic or were admitted to the internal ward in Assiut university heart hospital, Egypt. Results: Male patients had significant higher mean levels than females regarding; duration of vigorous/ moderate activity per day, duration of walking and using bicycle, duration of vigorous/moderate sports per day (p < 0.0001). The mean duration of moderate activity per week (day) was significantly higher in less than 60 years than in 60 years or more (P=0.002). Conclusion: More than three quarter (77%) of the study population have insufficient physical activity. To overcome this, national awareness campaigns about physical activity should be increased.