Cupping therapy isn't new in many parts of the world., but the ancient Chinese practice only made it into the American mainstream a few years ago, thanks to Olympic gold medalist Michael Phelps.

Here, Michael Phelps shares with Fortune his top tricks ... such as acupuncture or cupping. “If my body is telling me something, I’m going to try something,” Phelps says.

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Those purple circles covering the shoulders and backs of swimmer Michael Phelps and other athletes? Those are bruises from cupping therapy, in which trainers apply the heated glass cups to loosen ...