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Leif Arrhenius (born 15 July 1986 in Provo, Utah) is a professional Swedish athlete competing in the shot put and discus throw. He represented his country at two World and three European Championships. In addition, he is the 2011 US Collegiate Indoor Champion.
Born in Utah, Arrhenius has dual Swedish and American citizenship. He is the son of Anders Arrhenius, who was a professional shot put competitor in Sweden. His older brother, Niklas, is also a shot putter and discus thrower.
Arrhenius represented Brigham Young University from 2005 and 2008-2011. He was a seven-time All-American while competing for Brigham Young University. He was 2011 NCAA indoor champion in the shot put. 
|2011||World Championships||Daegu, South Korea||22nd (q)||Discus throw||61.33m|
|2012||European Championships||Helsinki, Finland||13th (q)||Shot put||19.33m|
|17th (q)||Discus throw||60.49m|
|2013||European Indoor Championships||Gothenburg, Sweden||10th (q)||Shot put||19.61m|
|World Championships||Moscow, Russia||14th (q)||Shot put||19.53m|
|2014||European Championships||Zürich, Switzerland||17th (q)||Shot put||19.54m|
|2015||European Indoor Championships||Prague, Czech Republic||19th (q)||Shot put||19.07m|
|2016||European Championships||Amsterdam, Netherlands||23rd (q)||Shot put||18.64m|
- Shot put – 20.50 (Hässleholm 2013)
- Discus throw – 64.46 (Växjö 2011)
- Hammer throw - 63.62 (Provo, Utah 2014)
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