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So Many Gains: How Gymshark Founder Became U.K.’s Youngest Billionaire by Embracing Lifting Roots

The story of Gymshark founder Ben Francis has all the elements of a fantastic budding entrepreneur-to-billionaire story.

Instagram Will (Finally) Pay Influencers

The company is rolling out new ways for its creators to make money—and they might sound familiar.

Is This the Breakout Star of Virtual Fitness?

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.