 A total of 23 teams yielding 318 basketball players have been pre-screened and trained and post-screened September 1, 2009 through April 30, 2010. A total of 29 teams of approximately 306 soccer and volleyball players 31 of which were not new athletes and were tested in prior basketball season were pre-screened, trained and post-screened between May 2010 and December 2010. We have faced challenges recruiting soccer players at the junior high school level in the county school system. Some of the junior high schools do not have organized soccer teams. We are addressing this challenge by recruiting volleyball teams within the county in order to fill in all of our randomized blocks. In addition, we will capture those athletes that will go on to play high school soccer, volleyball and basketball within the Fayette county school system see supplement summary below. Thus far, we have enrolled and pretested N31 tested for both seasons and tested a total of 593 athletes for our randomized controlled trial from 9109 through 123110. The breakdown by sport and school level is summarized in the Enrollment Table. There were 558 athletes made the cuts on their respective teams who were randomized by cluster team into the intervention. This number includes all athletes who completed at least 1 intervention training session. 