Why this it-girl approved trainer might be the best-kept fitness secret (for now)

Lauren Kleban, founder of LEKFit—a dance-inspired HIIT workout with fans like Busy Philipps and Judy Greer—is taking her brand global with new free videos.

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Photo: LEKFit

Adult Ballet is on the Rise—And Yes, You Should Totally Try it

Here's what to know before your first class.