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Gaining the Competitive Edge Introduction: Hormone supplements, commonly referred to as "performance enhancing drugs," are common ways that athletes gain competitive edges over their competitors. With your group, review the two case studies below and answer the associated questions. Case Study I: HGH use in the NFL. It is well known that many NFL players routinely use human growth hormone (HGH) supplements to improve their performance on the field. In recent years, the NFL Player's Association (NFLPA; their worker's union) has collectively opposed HGH testing of NFL players, despite the NFL wanting to include HGH on its banned substances list. To test for abnormal HGH levels, testers would take blood samples to determine if a player's blood HGH concentration was abnormally high. The NFLPA, however, believes that testing for HGH is inaccurate and will cause more problems than it is worth. 1. What physical benefit would NFL players gain by using HGH supplements? Why do you think HGH use in the NFL is so widespread? 2. The NFLPA believes that the tests for abnormal HGH levels are inaccurate and will lead to many false positives. In regards to what you know about HGH levels in humans, what would be the major difficulty in determining whether a player has "abnormal" HGH levels in his blood?