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Trained by Dainis Lodiņš, Žolnerovičs finished the 3000m steeplechase at the 2008 Summer Olympics in Beijing with a time of 8:37.65 (32nd overall).
Trained by Dainis Lodiņš, Žolnerovičs finished the 3000m steeplechase at the 2008 Summer Olympics in Beijing with a time of 8:37.65 (32nd overall).
He is the current holder of the Latvian record both in marathon and half marathon. At the 2011 Lisbon Half Marathon Žolnerovičs broke the Latvian record in half marathon, finishing after 1:04:43. At the 2013 Frankfurt Marathon Žolnerovičs broke the Latvian record in marathon for the second time, finishing after 2:14:33.