Exercise gets your heart rate up and improves your blood circulation, which increases the oxygen and nutrients delivered to your skin. This, in turn, increases your natural collagen production and encourages new skin cells to form and that without mentioning that luminous post-workout glow. Running, dancing, pilates, and yoga are all great ways to give your skin that extra boost. Bikram yoga, in particular, is a great way to stretch and remove impurities from your pores.