Nail polish, second warm-ups and very specific arm movements. Those are just some of the superstitions some Olympic swimmers follow before getting in the water. Team USA’s Paige Madden interviews some ...

For someone who is 155 pounds, 30 minutes of vigorous lap swimming can burn 360 calories, per Harvard Health. By comparison, ...

Sweeney is a contributor for TIME. Photo-Illustration by Chloe Dowling for TIME (Source Images: Natalie Board—Getty Images, Ira T. Nicolai—Getty Images, Tess Trunk—Getty Images, fongfong2/Getty Images ...