Jakub Krzewina is a Polish track and field sprinter who specialises in the 400 metres. A frequent competitor for Poland in the 4×400 metres relay, he has won two medals at the European Athletics Championships and reached the final at the 2016 Summer Olympics. He was also a relay silver medallist with Europe at the 2014 IAAF Continental Cup.
Jakub Krzewina at the 2018 IAAF World Indoor Championships
The 4 × 400 metres relay or long relay is an athletics track event in which teams consist of four runners who each complete 400 metres or one lap. It is traditionally the final event of a track meet. At top class events, the first leg and the first bend of the second leg are run in lanes. Start lines are thus staggered over a greater distance than in an individual 400 metres race; the runners then typically move to the inside of the track. The slightly longer 4 × 440 yards relay, on an Imperial distance, was a formerly run British Commonwealth and American event, until metrication was completed in the 1970s.
4 × 400 m men relay at the European Championships in Barcelona 2010 (Martyn Rooney (GBR), Thomas Schneider (GER), Kacper Kozłowski (POL), Jonathan Borlée (BEL), Vladimir Krasnov (RUS), Teddy Venel (FRA))