"Dr. Yan Xin (嚴新

, a doctor of both Western and Chinese medicine as well as founder of the relatively popular Yan Xin Qigong school, suggests that in order for qigong to be accepted by the modern world it must pass the test of scientific study. Without such studies, Yan maintains that qigong will be dismissed as "superstition". In the mid-1980s he and others began systematic study of qigong in some research institutions in China and U.S. More than 20 papers have been published."
Most of what I find is in Chinese. I can't read Chinese. The English articles indicate that this particular individual is highly regarded (an "ataboy" from Former President Bush was listed) in the scientific community. If I find more articles, I will post them. But, the argument of it's scientific validity is in my opinion, settled.