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It’s a “50-minute high intensity, low impact, resistance training workout using slow and purposeful movements targeting the core, lower and upper body.” It’s behind cheeky, often-viral Instagram posts with captions like “this is where your email finds me” — overlaid on photos of rooms illuminated by blue lights and lined with custom-built pilates reformers. It’s also frequently shouted out by your favorite stars as the workout to end all workouts (and as the reason behind their camera-ready abs). The culprit? None other than Solidcore , of course, which recently generated even more buzz in the zeitgeist by rolling out its campaign with