Like to work out and get a good sweat in? Well guess what! Perspiration consists of 0.9 of sodium per grams/liter. So, if you are working out and perspiring for 30 to 45 minutes you are literally allowing sodium to sit on your skin. Basically, your skin is bathing in sodium while you are working out. This results in dehydration of the skin's water not oils. So, you might use a cream rich in oil however, it is water that your skin needs not oils. The answer, hyaluronic acid! Hyaluronic acid allows your skin to hold six times as much water and comes in serums, lotions, and creams. I recommend IS Clinical Hydra-cool serum and Aveda Hydrating Treatment Lotion both to be used in the morning and evening as your first post cleanse step while skin is still moist. Attention all athletes! Hit the showers asap when your workout is done. Also, Drink up both orally and topically!