Regular exercise boosts circulation. “It nourishes your skin, bringing more blood flow and oxygen to it,” says Mauro C. Romita, M.D., a board-certified plastic surgeon and founder of Ajune Center for Beauty Synergy in New York City. “This will help draw toxins out of the body.” Plus, all that sweating cleans out the pores of congested skin. “Working out corrects the hormonal imbalance that can cause adult acne,” Romita says.

To reap the beneficial skin effects of working out, a few extra steps are required, Sherber warns. “If you're acne prone, make sure to keep gentle, fragrance-free cleansing wipes in your gym bag.” Be sure to cleanse your face and other areas that tend to break out immediately after exercising, she says. “For eczema, wear fabrics that wick perspiration away from the skin, since the wet-dry-wet-dry cycle will dry out your skin and provoke flare-ups,” Sherber says. And above all, avoid exercising with makeup on your face.