
The ancient practice of cupping, where a section of skin is reverse-suctioned to provide relief to the injured or sore muscle below, has been prominently displayed at the 2016 Rio Olympics where swimmer Michael Phelps and a host of gymnasts are walking around with the after effects of the treatment: A perfectly shaped circular bruise. While cupping sounds enticing, little evidence suggests that the ancient treatment actually works beyond the often underestimated placebo effect. Instagram

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