He also cites specific organizations, such as the YMCA and the American Red Cross, to point out that large, influential health organizations are taking note of the danger of fainting underwater as a result prolonged holding of breath. The article also briefly mentions that additional briefings and rules are being implemented to prevent these deaths from occurring. The credibility of this source is solid, as it was found through the use of the University of South Florida library database. McCarthy, Dan. "Hypoxic Training: Misunderstood Application." Swimming in the United States. USASwimming, May 1, 2012. Web. September 13, 2015. The article “Hypoxic Training: Misunderstood Application” primarily describes what a shallow water blackout is and then goes into detail about hypoxic training. Due to its popularity in the swimming world, hypoxic training usually involves little or no breathing sets to best increase a swimmer's race time. The article also touches on the difference between hypoxic training and altitude training, meaning that athletes who train at altitude breathe less pressurized air while athletes who train in hypoxia simply breathe.