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"It was a thrill to [...] finally admit in a public form that I currently do cardio every three months," she posted on Instagram on Thursday after speaking at Reebok's #PerfectNever launch event panel.
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Longoria, 41, confessed in her Snapchat story Dec. 5 that she was working out for the first time after going exercise-free for two months.
"I finished SoulCycle," she said to camera with a makeup-free, bright red face. "It almost killed me. Look at my face — it's splotchy red. It's because I haven't exercised in two months and the blood is finally getting to my face!"
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"I don't have a trainer, and I don't really go to the gym," Ratajkowski, 25, told The New York Times last August. "I go on long walks or hikes with my girlfriends. That's about it. I'm just not a crazy fitness person. I'm definitely an outlier in the industry."
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Hayek has also said her long work days keep her from getting to the gym.
"Some people have the discipline to exercise in the morning, and I didn't develop that," the actress, 50, told PEOPLE last June. "I don't have time to exercise. I am working. I've had some 20-hour days."
Instead, Hayek says she stays toned by keeping her muscles activated throughout the day.
"I work with a woman in London who taught me how to hold my body in a way where the muscles are activated all day long, so even when you brush you're teeth, you're working the muscles," she explained.
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Landry, 43, took a two-year break from exercising after giving birth to her daughter Estela in June 2007. Instead of working out, the model relied on a home delivery meal service to drop her baby weight.
"I lost the majority of the weight pretty fast doing that," she told PEOPLE in 2009. "But I have to say, it was that 'skinny fat' when you don't work out and you're not toned."