Editor’s note: This segment was rebroadcast on Sept. 30, 2025. Click here for that audio. In the early 2000s, thousands of U.S. schools had their students race the clock to stack cups in gym class.

I am a huge fan of Peloton's various at-home workout offerings, especially the company's classic Bike and its incredibly versatile mobile app. Both of those provide me a gigantic archive of on-demand ...