I run at least 4 days a week, and it's amazing how much less muscle fatigue I feel. Although I don't feel any electrical stimulation, I definitely notice less fatigue during longer runs. It might be just the awareness that I'm getting some kind of support. And the moment I put on the socks, I love how snugly they fit around my ankles. The quality makes me feel that they're totally worth the price. I will definitely recommend them to my friends who are into running.