An Internet devotee, Ms. Stiles began using social media and other Web tools to lure people to yoga, an innovative move at the time. The YouTube videos and her modeling connections led to a yoga DVD with the model Brooklyn Decker that has also sold well at Target, and to her own DVD, “Yoga Anywhere: The New York Session.” Ms. Stiles blogged for Women’s Health magazine and for the Huffington Post, a platform that brought her more eyeballs; one of her 2009 posts, about Facebook addiction, is still among the site’s most-viewed, with nearly 1.2 million hits. And her iTunes podcast has even bested Oprah’s in the health category.

In 2007, Ms. Stiles left Ford and focused on teaching yoga. Parlaying her Facebook habit into something useful, she promoted the free classes that she offered in her tiny apartment on Bleecker Street and in her boyfriend’s place in the Flatiron district. At first, a trickle of people showed up. Eventually, she was packing 22 people into the living room and a couple more in the entryway and bathroom. She also taught private sessions, eventually charging up to $200 an hour.

Going private brought her into contact with a Page Six clientele. “In New York, you know, some women have their nanny, their cook and their yoga teachers,” Ms. Stiles said. “I realized it was a status symbol.”

It led to the opening of Strala — a word she said she and her husband made up, but it turns out to be Swedish for “radiates light” — in 2008, in a smaller space than she has now. Frugal and practical to the core, Ms. Stiles did not want to overextend; now, the studio is profitable enough that she is considering opening a second branch.

That year, she also met Michael Taylor — an Exeter-Harvard-Oxford man with perpetually mussed hair who runs a social media Web site, Odyl — on an ashram in upstate New York, where she had sneaked in M&M’s. The two married at City Hall, then traveled with her extended family to Negril, in Jamaica, where she persuaded her uncles, both farmers, to do yoga by the sea. The couple share a cramped loft around the corner from Strala that is bedecked year-round with Christmas lights.

“He was normal, he’s straight, he does yoga,” she said, with a laugh that comes easily and often. “I’m done for.”