![Natasha Hastings of the U.S. (R) and Moa Hjelmer of Sweden (L) compete in the women's 400 meters heats during the world indoor athletics championships at the Atakoy Athletics Arena in Istanbul Natasha Hastings of the U.S. (R) and Moa Hjelmer of Sweden (L) compete in the women's 400 meters heats during the world indoor athletics championships at the Atakoy Athletics Arena in Istanbul](https://c8.alamy.com/comp/2CXKCNA/natasha-hastings-of-the-us-r-and-moa-hjelmer-of-sweden-l-compete-in-the-womens-400-meters-heats-during-the-world-indoor-athletics-championships-at-the-atakoy-athletics-arena-in-istanbul-march-9-2012-reutersmurad-sezer-turkey-tags-sport-athletics-2CXKCNA.jpg)
Natasha Hastings of the U.S. (R) and Moa Hjelmer of Sweden (L) compete in the women's 400 meters heats during the world indoor athletics championships at the Atakoy Athletics Arena in Istanbul
![MOSKVA 20130815 Sweden's Moa Hjelmer runs with her fingernails painted in the colors of the rainbow as she competes in a women's 200-meter heat at the World Athletics Championships in the Luzhniki MOSKVA 20130815 Sweden's Moa Hjelmer runs with her fingernails painted in the colors of the rainbow as she competes in a women's 200-meter heat at the World Athletics Championships in the Luzhniki](https://c8.alamy.com/comp/2GJ82K1/moskva-20130815-swedens-moa-hjelmer-runs-with-her-fingernails-painted-in-the-colors-of-the-rainbow-as-she-competes-in-a-womens-200-meter-heat-at-the-world-athletics-championships-in-the-luzhniki-stadium-in-moscow-russia-thursday-aug-15-2013-foto-erik-martensson-scanpix-kod-10400-2GJ82K1.jpg)
MOSKVA 20130815 Sweden's Moa Hjelmer runs with her fingernails painted in the colors of the rainbow as she competes in a women's 200-meter heat at the World Athletics Championships in the Luzhniki
![Moa Hjelmer of Sweden reacts after winning the women's 400 metres final at the European Athletics Championships in Helsinki June 29, 2012. REUTERS/Dominic Ebenbichler (FINLAND - Tags: SPORT ATHLETICS Stock Photo - Alamy Moa Hjelmer of Sweden reacts after winning the women's 400 metres final at the European Athletics Championships in Helsinki June 29, 2012. REUTERS/Dominic Ebenbichler (FINLAND - Tags: SPORT ATHLETICS Stock Photo - Alamy](https://c8.alamy.com/comp/2E5N7GJ/moa-hjelmer-of-sweden-reacts-after-winning-the-womens-400-metres-final-at-the-european-athletics-championships-in-helsinki-june-29-2012-reutersdominic-ebenbichler-finland-tags-sport-athletics-2E5N7GJ.jpg)
Moa Hjelmer of Sweden reacts after winning the women's 400 metres final at the European Athletics Championships in Helsinki June 29, 2012. REUTERS/Dominic Ebenbichler (FINLAND - Tags: SPORT ATHLETICS Stock Photo - Alamy
![MOSKVA 20130815 Sweden's Moa Hjelmer runs with her fingernails painted in the colors of the rainbow as she competes in a women's 200-meter heat at the World Athletics Championships in the Luzhniki MOSKVA 20130815 Sweden's Moa Hjelmer runs with her fingernails painted in the colors of the rainbow as she competes in a women's 200-meter heat at the World Athletics Championships in the Luzhniki](https://c8.alamy.com/comp/2GJ82JY/moskva-20130815-swedens-moa-hjelmer-runs-with-her-fingernails-painted-in-the-colors-of-the-rainbow-as-she-competes-in-a-womens-200-meter-heat-at-the-world-athletics-championships-in-the-luzhniki-stadium-in-moscow-russia-thursday-aug-15-2013-foto-erik-martensson-scanpix-kod-10400-2GJ82JY.jpg)