Whether you can exercise after a blood draw depends on the size of the patient’s bleeding, some can exercise, some cannot, as follows: 1. Can exercise: the patient’s bleeding is relatively small, only 2-3 tubes of blood were drawn for some routine tests, and can exercise after the blood draw, because these blood volumes do not have any effect on the body and will not affect exercise. 2. Cannot exercise: the patient’s bleeding is relatively large, especially for blood donation When the time comes, 300-400mL of blood is drawn at one time, it is not recommended to exercise. This is because after the body loses blood, it will lead to a more obvious weakness. Exercise at this time can easily lead to organ damage and can cause weakness, which may lead to cold and flu. If the amount of blood donated is large, you should take rest and exercise after your body has slowly recovered. After the blood is drawn, you need to drink more water to replenish the water lost due to the blood draw.