Apart from on the 3,000 m, every one of these personal records was faster than the official world record on the given distance at the time, while in most cases, Mathisen himself already was the world record holder. As for the 3,000 m, this was not an official world record event, as governed by the ISU, until 1932. Both the first official world record on this distance (by Clas Thunberg in 1932) and the second one (by Michael Staksrud in 1933) were actually slower than Mathisen's personal record. When Ivar Ballangrud set the third official world record on the 3,000 m in 1935, the 3,000 m world record finally was faster than Mathisen's personal record.