IntroductionObesity is a growing problem in the United States. A 2009 study showed that 35% of Americans were obese (Ogden, Carroll, Kit, & Flegal, 2012). Those within the 35% are not just those suffering from obesity-related effects. In 1998, obesity-related health care costs were approximately $78.5 billion. That number had risen to $147 billion by 2006, and half of the costs were paid by Medicare and Medicaid (Finkelstein, Trogdon, Cohen, & Dietz, 2013). Obesity is defined as weighing more than a healthy weight for a certain height. Obesity is determined by body mass index, which is calculated using height and weight, which is directly linked to the amount of body fat. A total BMI of 30 or more is considered obese (Center for Disease Control, 2012). Proper Crossfit training promotes overall health and fitness and could be a solution to the growing obesity problem. HistoryCrossfit was founded by former gymnast Greg Glassman in Santa Cruz, California in 1995 (Reinink, 2013). Just five years later, a company known as Crossfit was born in 2000. Crossfit was originally popular among firefighters, police officers, first responders, and military personnel looking to improve their physical fitness (Sullivan, n.d.). Crossfit quickly began to gain popularity through social media, causing gyms to begin appearing across the United States and around the world. The number of gyms worldwide has grown from 12 in 2005 to over 5,000 in 2012 (Reinink, 2013). Crossfit eventually held its first Reebok Crossfit Games in 2007, featuring 70 of the world's fittest athletes competing for a $500 grand prize. In the most recent Crossfit games, there were 70,000 athletes competing for $250,000 (Sullivan, 2013...... mid-paper...... Attributable To Obesity: Payer- and Service-Specific Estimates. E-Journal of Health Affairs, Retrieved from http://content.healthaffairs.org/content/28/5/w822.full.pdf+html Ogden, C.L., Carroll, MD, Kit, BK, Flegal, KM(2012). in the United States, 2009-2010 E-Journal of cdc.gov, Retrieved from http://www.cdc.gov/nchs/data/databriefs/db82.pdf Reinink , A. (2013). Retrieved November 25, 2013, from http://www.bethesdamagazine.com/Bethesda-Magazine/January-February-2013/The-Cult-of-CrossFit/ Sullivan, D. (n.d.) November 11, 2013, from http://www.vpxsports.com /article-detail/industry-news/a-brief-history-of-crossfit Zelman, K. M. (n.d.). Retrieved 12 November 2013 from www.webmd.com/diet/features/diet-review-the-caveman-paleo-diet