Compression socks are everywhere in the running world: on the calves of marathoners and in the recovery bag after a long run. But how much are they really worth for running, when should you wear them, and how do you choose the right pair? Here is our clear guide, made for runners.
Compression socks vs medical compression stockings: what’s the difference?
People often confuse the two, and the distinction matters. Medical compression stockings are medical devices, prescribed to treat venous problems (varicose veins, oedema, clot prevention while travelling) and sold in pharmacies according to a prescription and precise pressure grades. Sports compression socks, on the other hand, are designed for training and recovery: they apply a graduated compression, firmer at the ankle and lighter toward the top, to support circulation during and after exercise.
At Boréal Running, we offer running compression socks, not medical compression stockings. If you are looking to treat a venous condition, speak to your pharmacist or doctor: only they can assess your situation and prescribe the right grade.
The benefits of compression socks for running
Graduated compression targets two distinct moments: the effort and the recovery.
During the run
By gently compressing the calf muscles, the socks limit muscle vibration and support venous return. Many runners report steadier legs and less fatigue at the end of a long run. Research remains mixed on a pure performance gain, but the comfort and support many people feel are very real, especially over long distances and on trail.
After the effort: recovery
This is where the evidence is most convincing. Wearing compression socks after a demanding run can reduce the feeling of heavy legs and soreness by supporting drainage and venous return. That is why so many runners slip them on after a long workout, a race, or even during a long car or plane trip.
During or after the run: when to wear them?
During: on long runs, trail and races, if you enjoy the feeling of support. After: in the hours following an intense effort, for recovery, the best-documented use. While travelling: on long seated trips, they help limit swelling. There is no need to wear them all the time: keep them for the moments when the benefit is real.
Shin splints, heavy calves: when compression can help
Runners prone to shin splints or who feel heavy calves sometimes use compression socks or sleeves to support the area and improve comfort during effort. Compression does not « heal » an injury (if pain persists, see a professional), but it can be part of a comfort and recovery strategy.
How to choose your running compression socks
Pressure level (mmHg)
Compression is measured in millimetres of mercury (mmHg). For sport, we generally talk about 15-20 mmHg (light, versatile compression) or 20-30 mmHg (moderate, more pronounced, popular for recovery). Higher grades are medical and require a prescription. For running and recovery, 15-20 or 20-30 mmHg cover the vast majority of needs.
Height: knee, mid-calf or ankle
Knee-high socks target the calf, the key zone for running. Calf sleeves offer the same compression without the foot, handy to combine with your favourite socks. Lower compression socks suit light everyday support.
Material: synthetic or merino wool
Synthetic fibres wick moisture and dry quickly. Merino wool (as with Smartwool) regulates temperature and naturally resists odours, a real advantage in cool weather and on very long runs.
Size and fit
Compression should be firm, but never painful. Follow each brand’s size guide (often based on shoe size and calf circumference). A sock that is too loose does not compress enough; too tight, it hampers circulation. When in doubt, trying them on in store settles the question.
How to put on and care for your compression socks
To put them on without straining, roll the sock down to the heel, slide in your foot, then gradually unroll upward rather than pulling all at once. For care, wash in cold water, without fabric softener (it damages the elastic fibres) and air-dry: it is the best way to preserve the compression for as long as possible.
Compression socks or regular running socks?
For everyday running, a good technical, blister-resistant running sock is plenty. Keep compression for long distances, recovery and travel. Many runners keep both in the drawer and choose based on the day’s run.
Where to find running compression socks
Boréal Running is a specialty running retailer: shop our running socks, including compression and merino wool Smartwool options, for men and women. Fast shipping across Canada, or visit the store for a fitting and personalized advice.