NEW YORKMore than two decades after the breakdancing craze peaked, the first data on its long-term health effects was published Tuesday in the Strong Island Journal Of Medicine. 'We've found permanent shoulder pop, elbow lock, and spin-neck in '80s-era breakdancers,' said Dr. Young MD, the report's author. 'For years, many subjects had thrown their hands in the air without exercising the proper care.' Breakdancing researchers hope to further medical diagnostic advances pioneered by 1999's groundbreaking 'Death Before And After Disco' study. 