Were B. Elliott et al the first to publish the biomechanical breakdown of the serve with regard to the relative contributions of internal shoulder rotation and other joint movements? In the early '90's? Elliott review article- Biomechanics and Tennis, 2006 http://www.stms.nl/download/BJSM/2006/Biomechanics_and_tennis.pdf Other early researchers? Any tennis researchers from much earlier, etc? It would seem that the Eastern European researchers starting in the sixties would have identified IRS as important for throwing motions. ? IRS was associated with baseball pitching in a 1988 publication if not earlier (Elliott reference).