So if you read Part One of our talk with certified dermatologist Dr. Doris Day, you know that too much exercise can start to have premature aging effects on your skin.

"Exercising is hard enough without the added stress of aging. It requires motivation, inspiration and commitment. You shouldn't have to choose between being fit and looking good," Dr. Day said. We agree!

Here are some things the expert says you can do to look your best starting now:

Ready to reboot after that run? Tell us below!