MARK THOMAS / SCIENCE PHOTO LIBRARY MARK THOMAS / SCIENCE PHOTO LIBRARY
Acupuncture. Acupuncturist's hands placing acupuncture needles into a male athlete's knee in order to treat overuse of the joint. Acupuncture has been used in Eastern medicine for thousands of years. It involves inserting needles into the body at points along energy lines known as meridians. In Western medicine, it is believed that the needles stimulate the production of endorphins, the body's natural painkillers.
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