Amid the all the world records and Olympic gold medals, Michael Phelps is just another guy who's had to deal with a problem that's confronted many other people: attention-deficit hyperactivity disorder, or ADHD. After an inability to concentrate led to the diagnosis when Phelps was in middle school, he worked with his parents and teachers to impose a better structure on his life and learning habits. Coupled with the right medication and dedication, he was able to overcome the issue.
Friday Swimspiration! "Don't put a limit on anything. The more you dream, the further you get." – Swimming sensation – and the most decorated Olympian of all time – Michael Phelps, to the U.K.'s Daily Mail
BEIJING - AUGUST 10: Michael Phelps of the United States poses with the gold medal during the medal ceremony for the Men's 400m Individual Medley event held at the National Aquatics Center during day 2 of the Beijing 2008 Olympic Games on August 10, 2008 in Beijing, China. Michael Phelps of the United States finshed the race in a time of 4:03:84, a new World Record. (Photo by Shaun Botterill/Getty Images)