The amount of compression therapy done will vary based on patient needs with each set lasting about 30 minutes. When combined with movement, compression therapy is very effective. Compression helps return blood to your heart when you walk and activate your calf muscles. Together they can reduce swelling in the legs. Depending on a patient’s health and activity levels the amount of compression can vary considerably, and it will also depend on the type of material being used, its firmness, and your movement. Some cases during which compression therapy is used include management of varicose veins, prevention of leg swelling for people who sit or stand for long periods, management of leg symptoms during pregnancy, and improved healing of leg ulcers. It may also be used for the prevention of venous thromboembolism, maintenance therapy for lymphedema, and other cases.