Career
He skis with the Skogn Illinois club, in Nord-Trøndelag. He was 62nd in the distance standings, 520 points behind Teichmann, and came second in the sprint discipline, 237 points behind fellow countryman Tor Arne Hetland. He also came second in the sprint discipline at the Norwegian national championships.
Rønning shared the 2005/06 season between the World Cup and the Scandinavian Cup, competing almost exclusively in sprints.
Rønning also came fifth twice, both in sprints, his only other race in the World Cup when he finished inside the top 20, was a 16th place in a sprint, in Oberstdorf. Rønning finished the season in 11th place in the FIS World Cup overall standings, 474 points behind German Tobias Angerer.
In addition he has 8 individual world cup podiums. Rønning has earned 6 medals at the FIS Nordic World Ski Championships with four golds (4 x 10 km relay 2007, 2009, 2011, 2013), one silver (15 km classical 2011) and a bronze (classical sprint 2007).