You've probably noticed more and more elite athletes wearing compression socks and wondered why — and what they actually do. If seasoned athletes use them, it's surely because they deliver real gains in efficiency, comfort and recovery. Let's explore the reasons together, and why even at a more modest level you can benefit enormously for a reasonable investment.
The physiology
Blood circulates in both directions between the heart and the rest of the body: on the way out, the heart pumps blood to your organs, but on the return journey the heart acts as a vacuum pump (the cardiac cavity handles most of the blood's return) — though in reality, depending on the part of the body, this is more or less difficult. If you think about it, from the ankles, blood must travel vertically upwards over 1.2 metres to reach the heart: no small feat! To achieve this, our body is equipped with a kind of lock-and-valve system that divides the total effort into a multitude of steps just a few centimetres apart. On top of this, there is another key aspect to understand. There are two venous return circulation networks: a deep network within the muscles, and a superficial network between the skin and the muscles. The deep, or intramuscular, network has a powerful mechanism: each muscle contraction compresses the veins and drives blood upwards from valve to valve. In general, barring a pre-existing venous condition, this causes few problems. The superficial network, however, lacks this natural compression system, and the risk of blood pooling is very real — bringing with it toxins, oedema and leg pain.
How does it work?
Compression socks create an "artificial" force around the skin, flattening the superficial venous network — which benefits from an effect that prevents blood pooling and promotes venous return. The recognised effects for people with varicose veins and phlebitis have simply been extrapolated for athletes. On the market, there are two main types of compression socks. The first have no foot section and stop at the ankle — these are primarily designed for use during exercise. The others are more suited (though not exclusively) to recovery, have a foot section and are comparable to standard socks.
In practice
During exercise and competition, you can use this type of product: it will have a substantial effect on your comfort and recovery quality after effort — though, clearly, the impact on performance will be marginal, unless you're competing at a very high level where every fraction of a percent counts. That said, according to some athletes, the gain in terms of muscle support is essential, limiting the effects of muscle oscillation and providing a sense of efficiency that some simply can't do without. For recovery, the benefit is very real and the positive post-exercise effect has been medically proven. Compression drastically limits blood pooling in the areas concerned, preventing oedema (even those invisible to the naked eye) and the sensation of heavy legs — delivering a very significant recovery gain. It's worth noting that for maximum effectiveness, you must put on your recovery socks immediately after exercise and not wait: this is essential to optimise recovery and prevent leg fatigue.
The benefits of compression for athletes are well established, and its use is widely recommended — delivering a genuine advantage, particularly in all endurance sports. But don't think this is limited to experienced athletes. The occasional walker or long-distance hiker will find real comfort each evening after their daily stage by wearing recovery socks. These will optimise recovery and make it easier to get going again the next day, eliminating that unpleasant sensation of fatigue and heavy legs.
