Katie Ledecky crushes the competition. She crushes her own records. She destroys world records. Everyone asks, "How does she do it?" She has nearly perfect form, with an imperfect body for swimming. She has great coaching. But the secret sauce is grit.

Building off of impressive swimmers such as Mark Spitz and Ian Thorpe, Michael Phelps has made swimming awesome.

I had not heard the name Penny Oleksiak before this week. A 16-year-old swimmer from Toronto competing at the Olympics. Her mom said in an earlier interview that Penny always goes for it right until the end of a race. Even when she is behind.

She's coming for your medal record, Michael Phelps.