You've probably been told that wearing makeup to work out isn't a good idea because it can clog pores, but even if you head to the gym with a clean face, you're still at risk of breaking out if you don't wash it right away after your workout.
"When you exercise, the blood vessels in the skin dilate (or open wider), allowing more blood to reach the skin's surface, helping with free radical damage and improving collagen formation," explains Machbein. "The pores also open, which allows for dirt and oil to be pushed from the skin. This is why it is so important to wash your face both before and right after exercising so that the pores don't get clogged again and that acne doesn’t form."
She recommends at least cleansing your face with a gentle wipe such as Simple Kind to Skin Micellar Makeup Remover Wipes ($8; priceline.com.au) to remove sweat. When you do have time to shower, make sure you apply a gentle, hydrating facial and body moisturizer with SPF once you've dried off.
Now you know what you should pack in your gym bag if you're not taking a clean set of clothes with you.