Do compression socks help runners?
Compression socks have modest evidence for reducing post-run muscle soreness and swelling during recovery, but minimal evidence for improving performance during running itself. They're most useful for long flights before races, long recovery sessions, and runners prone to calf cramps or lower leg swelling.
Compression socks and sleeves apply graduated pressure to the calves (tighter at the ankle, looser near the knee) to promote venous return and reduce muscle oscillation. The research picture: modest evidence that wearing compression during recovery (post-run, overnight) reduces muscle soreness and perceived fatigue by 5-15%. Clearer evidence that wearing them on long flights before races prevents calf swelling and may reduce blood clot risk. Minimal evidence that wearing them during running improves performance — most studies show 1-2% improvements that may be placebo. Practical uses for runners: (1) Post-run recovery, especially after long runs or races — wear for 1-4 hours after finishing. (2) Travel to races — wear on the flight to prevent pooling. (3) Long standing days after races — helps reduce swelling and soreness. (4) Runners prone to calf cramps or shin splints — may provide some support. Quality matters: look for medical-grade compression (20-30 mmHg) from brands like CEP, 2XU, Zensah, or Pro Compression. Cheap versions don't have the pressure gradient that makes them work. Sizing is based on calf circumference — too tight cuts circulation, too loose does nothing. Cost: 2,000-5,000 INR per pair. Not essential gear, but a nice addition for runners doing 60+ km per week, racing frequently, or training for marathons and ultras.