Compression is not a new technology; it has been used for years in medical patients with venous and arterial insufficiency. However, the application of this technology to athletics is relatively new. There is clear evidence to support compression use in promoting recovery. Using compression socks after a race or hard workout provide substantial benefits. These garments will help to avoid venous stasis (blood pooling in legs) and swelling. Compression is particularly helpful in depended areas of the body, such as the feet and lower legs where gravity has a greater effect on blood return. Improved blood flow after a workout results in enhanced nutrient delivery and removal of waste products to and from muscles. This creates a situation optimal for muscle repair, reduced stiffness and heaviness in the legs and possible less soreness. Several studies have demonstrated that post exercise blood lactate levels were lower with compression socks to create a major fluid shift in the body. Compression garments are believed to improve venous blood return to the heart and allow for better cardiac output (flow of oxygenated blood from the heart) thereby aiding oxygen delivery to working muscles and increased endurance.