Niklas Bo Arrhenius (born September 10, 1982) is an American-Swedish track and field athlete who competes and coaches in the discus throw and shot put.

At the Swedish Athletics Championships he won seven national titles in discus, and was an eight-time champion in the shot put (combined indoors and outdoors).

[7] Having competed for Sweden internationally for most of his career, Nik applied to transfer his eligibility to the United States on August 25, 2019.

[4] The decision was made on March 24, 2020, that starting August 26th, 2022, he would be eligible to represent the United States instead of Sweden.

[2] On his fifth throw of the day, he launched the disc 206 feet, 2 inches to pass Stanford University Cardinal's Michael Robertson.

[3] History almost repeated itself, like father, like son, or déjà vu, as both had qualified for the Olympics for Team Sweden and both suffered injuries just before the Games started.

Nik has coached Ashton Riner to the 2022 NCAA track & field championships in Eugene, Oregon.

[20] Here is an external link to a 43-second video of the 1912 Tug of War competition:[21] Anders Arrhenius, was born in Sweden in 1947.

[6][23] In the early 1970s, Kristine Fowler, who is from Rose Park, Salt Lake City, went to Stockholm, Sweden, on a church mission, where she first met Anders Arrhenius.

[25] Dan also went on a church mission to Stockholm, Sweden, just like his mother and younger brothers, Nik and Leif.