Regular exercise is one of the keys to good healthy skin! The reason is because of the cardiovascular benefits of exercise which are important. Basically anything that promotes healthy circulation also helps keep your skin healthy and vibrant, so whether you like to go hiking, biking, running, just about anything else physical, it plays an important role in your skins health.
It works because- by increasing blood flow, exercise helps nourish skin cells and keep them vital. Blood carries oxygen and nutrients to working cells throughout the body, including the skin, and in addition to providing oxygen, blood flow also helps carry away waste products, including free radicals, from working cells.