Alana Sigg, Perrysburg High School swim team’s new head coach, had the team swim in sweat pants and shirts for practice last week.

What? Why?

“Swimming in sweats is a fun, playful way of training to help swimmers get a very strong sense of the effects of drag in the water,” Ms. Sigg said. “While we are increasing our heart rate by swimming and laughing, we can discuss the importance of reducing drag…