Junior is a category of athletics in which athletes compete under the age of 20 years. Countries all around the world compete in athletics. World Junior Athletics Competitions are held every two years which contain the best junior competitors in the world.
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The 2012 World Junior Championships in Athletics was an international athletics competition for athletes qualifying as juniors (born 1993 or later) which was held at the Estadi Olímpic Lluís Companys in Barcelona, Catalonia, Spain, on 10–15 July 2012. A total of 44 athletics events were contested at the championships, 22 by male and 22 by female athletes.
Several medalists from the 2010 championships were eligible to defend their titles, including Jacko Gill, Jodie Williams, Shaunae Miller, and Angelica Bengtsson. Gill and Bengtsson were successful.