How long it takes to exercise a DVT in the calf is not exactly the same for every patient. In the case of deep vein thrombosis in the popliteal vein, absolute bed rest and braking is required. In the case of inferior vena cava without a filter, absolute bed rest is usually required for 3 weeks, and after 3 weeks, the patient can get out of bed. In addition, in the case of intermuscular vein thrombosis, the ability to exercise is also related to the size and diameter of the thrombus. If the thrombus is less than 5mm, it is possible to move around the bed or go to the bathroom. If it is a large thrombus, >7mm in diameter, absolute braking is also required. Because it may be dislodged in the acute stage, there is a risk of pulmonary embolism.