Emma Karolin Rienas (born 15 October 1982) is a retired Swedish sprinter. She represented her country in the 4 × 100 meters relay at the 2005 World Championships. Additionally, she finished sixth in the same event at the 2010 European Championships.

International competitions Representing 1999European Youth Olympic DaysEsbjerg, Denmark3rd100 m12.112000World Junior ChampionshipsSantiago, Chile3rd4 × 100 m relay44.782005World ChampionshipsHelsinki, Finland11th (h)4 × 100 m relay43.672006European ChampionshipsGothenburg, Sweden27th (h)100 m11.768th (h)4 × 100 m relay44.082009European Indoor ChampionshipsTurin, Italy12th (sf)60 m7.402010World Indoor ChampionshipsDoha, Qatar15th (sf)60 m7.38European ChampionshipsBarcelona, Spain6th4 × 100 m relay43.75

Personal bests Outdoor 100 metres – 11.54 (+1.8 m/s, Sundsvall 2009) 200 metres – 24.00 (0.0 m/s, Sollentuna 2006) Indoor 60 metres – 7.32 (Turin 2009) 200 metres – 25.18 (Malmö 2005)

References