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Cable resistance exercises were a favorite
of Jean Harlow
—and the fact that she's using her exercises to model adorable swimwear makes it even more fun. However, the actress famously struggled to keep her trim figure and was known for gaining weight between films and then returning to a strict diet of salads
to get back in fighting form. While we don't condone her yo-yo dieting technique, it is nice to know that not every glamour girl was just born that way.
How the original list of sexiest celebs stayed in camera-ready shape
Shape-Up Secrets from Old Hollywood Glamour Girls