Hammerseng started her handball career in 1990 at Gjøvik HK. She later played one year for Raufoss IL and one year for Vardal IF before starting her senior career in 1997 for Gjøvik og Vardal HK. Hammerseng was Gjøvik og Vardal's captain during her six seasons with the club. In 2003, after serious economic problems at her hometown club, Hammerseng signed with Danish top club Ikast-Bording, since November 2008 called FC Midtjylland Håndbold. Gro stayed 7 years in Denmark playing for the Danish club FC Midtjylland Håndbold, but on 17 February 2010 she signed under a 2-year contract with the Norwegian handball club Larvik HK. Gro has played for Larvik since the 2010/11 season and ended her career after the 2016/2017 season. Hammerseng-Edin retired from the sport of handball on 21 May 2017, after winning the Grundigligaen finals with Larvik that day.
National team
Hammerseng made her debut with the Norwegian national team on 29 November 2000 against Poland in Bergen, Norway. Her first major tournament was the 2000 European Championship in Romania, where Norway finished sixth. She received a silver medal at the 2001 World Championship and at the 2002 European Championship. In December 2003, coach Marit Breivik made Hammerseng captain of the team, replacing fellow Gjøvik native Else-Marthe Sørlie Lybekk. The 2003 World Championship was her first competition as captain, but Norway was not successful and finished the championship in sixth place, thus missing the opportunity to participate in the 2004 Summer Olympics. The 2004 European Championship brought her first gold medal with the team. Hammerseng saw her performance recognized as she was voted MVP and member of the All-Star Team of the tournament. After a serious knee injury kept her out of the court in the 2005/06 season, Gro Hammerseng repeated her 2004 success at the 2006 European Championship in Sweden. She received her second gold medal and was again named MVP and member of the All-Star Team of the tournament. At the 2007 World Championship, Norway was defeated by Russia in the final match, marking the third silver medal for Hammerseng. She was voted into the All-Star Team as best left back. The 2008 Summer Olympics gave the Norwegians an opportunity for revenge, as they met Russia in the final match. After a comfortable 34–27 win, Hammerseng received her first Olympic gold medal. As of 22 December 2010, she has played 167 games for Norway, scoring 631 goals.
All-Star Team: European Championship 2010 - Best Playmaker -
’Team Player’ of the year, Norwegian Sports Gala
Personal life
Hammerseng was in a long-term cohabiting relationship with fellow Larvik HK and Norwegian national team playerKatja Nyberg. In August 2010, they announced that they had split up even though they would continue to play together for Larvik.. Gro Hammerseng began a new relationship with Larvik teammate Anja Edinin the summer of 2010. They married in 2013. Hammerseng gave birth to their first son, Mio in 2012 and their second son, Leo in 2018. In 2014, Hammerseng and her wife published their book, Anja + Gro = Mio, which is about having a child as a lesbian couple. In the lead-up to the 2008 Beijing Summer Olympics, Hammerseng joined other Norwegian athletes in an Amnesty International campaign for human rights in the People's Republic of China.
Results
Norway">Norway women's national handball team">Norway
