Every morning, Isaac Calpito sets the stage in the East Hampton living room of his friend Stephanie DiTullio. Mr. Calpito, 39, is dressed, often, in sparkling yoga tights and a tank top that show his muscles to good advantage. His main prop is an iPhone.

Mr. Calpito has been leading the classes virtually since March 17. Last week, about 2,500 people tuned in every day. The video of each class remains accessible on Instagram for 24 hours, and he said an additional 17,500 people typically tune in during that time. (On three occasions, Mr. Calpito has broadcast on a split screen that showed the actress Vanessa Hudgens and Lisa Rinna, a star of “The Real Housewives of Beverly Hills,” doing their Torch’d workout. Each of those classes attracted about 8,000 live viewers. The last time Mr. Calpito featured Ms. Hudgens, more than 250,000 people watched during the 24-hour period.)

The class is free, but Mr. Calpito asks that people… READ MORE @ NYTIMES

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