Your skin

Moderate exercise, such as a brisk walk, increases blood flow to the skin, keeping the cells nourished and healthy looking. That increased blood flow also carries away more waste products such as free radicals, which are a cause of wrinkles. Dermatologist Ellen Marmur says: “You can think of it as cleansing your skin from the inside.” And exercise helps to improve muscle tone. Although that doesn’t directly improve the quality of your skin, firmer muscles help you look healthier and younger.