After cardiac surgery Patients present a loss of exercise capacity, muscle mass, and quality of life Cardiopulmonary rehabilitation aims to reduce the loss of muscle strength, size and increase cardiopulmonary function so that quality of life is maintained as much as possible after open-heart surgeries. Traditionally, cardiac rehabilitation consist of low-intensity aerobic exercise. Therefore, cardiac rehabilitation should include not only aerobic but also resistance training (RT),. A safe and effective version of RT is needed that can still improve muscle strength and size in patients early after cardiac surgery,It is found that BFR can achieve the same result with low intensity which is suitable for patient post cardiac surgery,so the result of this study will provide a safe resisted exercise useful for post cardiac surgery patient