Career
He was fourth in the double sculls event with Leonid Gulov at the 2004 Summer Olympics in Athens. Endrekson competed in the World Rowing Junior Championships in 1996 in the double sculls event (24th) and 1997 in the single sculls event (16th). His first appearance in the was in Athens 2004, where he competed in the double sculls event with Leonid Gulov.
The men were third in their preliminary heat and second in semi-final thus earning a place in the Final A. They held the sixth position for the first 1500 metres, but with the strong final 500 metres they managed to clinch the fourth position.
Eventually they lost the bronze medal to Italians Rossano Galtarossa and Alessio Sartori by 2,37 seconds. In Beijing 2008 Endrekson also competed in the double sculls event but now with Estonian rowing legend Jüri Jaanson.
The duo was third in their preliminary heat. In the semi-finals the men were second and assured themselves a place in the Final A. They finished second in the final just 0,05 seconds in front of the British duo Matthew Wells and Stephen Rowbotham.
At London 2012, he competed in the men"s quadruple sculls with Andrei Jämsä, Allar Raja and Kaspar Taimsoo, finishing in fourth place.
Endrekson debuted in the World Rowing Championships in 2001 in Lucerne, Switzerland. He competed in the quadruple sculls event with Leonid Gulov, Andrei Šilin and Silver Sonntak. 2003 in Milan, Italy Endrekson, Gulov, Šilin and Sonntak were 7th once more.
In the 2006 held in Eton, Great Britain Endrekson was again in the bronze-winning quadruple sculls team with Jämsä, Kuzmin and Allar Raja.
Gold medals went to Poland and silver medals to Ukraine. In 2007 season Endrekson decided to compete in the double sculls with Jaanson.
Foreign the 2009 held in Poznań, Poland, Endrekson was back in the quadruple sculls team, this time together with Jämsä, Kuzmin and Vladimir Latin. The team finished 10th overall.
Endrekson competed in the 2010 in the single sculls event finishing 9th overall.
Overall wins
Quadruple sculls: 2005
Double sculls: 2007
Order of the White Star, 2nd Class: 2009.