Compression garments “work” by constricting your muscles. That reduces the amount of fluid buildup, decreasing the swelling and pressure.
“Compression garments also may increase blood flow to the muscles, which removes creatine kinase, an enzyme in your muscles that leaks out after muscle damage and can cause the ache,” says Hill.
The tight gear isn’t salvation from soreness, though—it only helps.
Spanish scientists had a group of soccer players wear a compression sleeve on one leg, and nothing on the other leg. Then the players ran downhill for 40 minutes (an activity commonly used to elicit soreness). They showed 27% fewer markers of soreness in the compressed leg compared to the free leg.
And a U.K. study found that marathoners who wore compression tights in the 24-hours after crossing the finish line reported feeling less sore, but not ache free.
Bottom line: think of compression gear as another weapon in your arsenal against post-exercise aches.
Looking for a good pair of compression pants, shorts, or a shirt? Check out those from 2XU. Hill uses that brand in her research and says, “People seem to like wearing them. I get reports that they ‘feel nice.’”
But be warned: The same reason that compression gear “feels nice”—mainly, the clothing’s nut-caressing properties—is also why it may not look so nice to others.
“It gives off a lot of information, if you know what I mean. That can make other people uncomfortable,” says MH Fashion Editor Brian Boye.
His advice is to treat tight gear like underwear. “Wear it as a base layer, under traditional gym clothing,” he says.