Biathlete Johannes Thingnes Boe won the men's 15km mass start to claim the 15th Norwegian gold medal at the 2022 Games on Friday, a Winter Olympics record achieved due to the country's high level of professionalism across the board.

With two cross-country skiing races left, Norway already has victories in the biathlon, ski jumping, Nordic combined, speed skating, cross-country and freestyle skiing, so no-one could accuse them of being one-trick ponies.

"Yeah, that's something to remember, even though we'll probably get one more during this weekend. I was thinking about this on the last lap, it's cool to be the guy that does the 15th gold," a delighted Boe told Reuters.

Such is their depth of talent that Norway could afford to lose athletes of the caliber of Nordic combined skier Jarl Magnus Riiber and cross-country skier Simen Hegstad Krueger to COVID-19 for much of the Games and still beat the record.

At the 2022 Games there are 109 gold medals in total, up from 102 in PyeongChang four years ago and a far cry from the 16 on offer at the first Winter Olympics at Chamonix in 1924.

Marte Olsbu Roeiseland and Boe led the Norwegian medal charge in the 2022 biathlon events, with Therese Johaug and Johannes Hoesflot Klaebo doing the same a short distance away at the cross-country track, while at the ski jumping venue in between Marius Lindvik took gold on the large hill.

At the 2018 PyeongChang Olympics, Germany and Norway had equaled the record of 14 gold medals won by a country at one Winter Games, matching the tally Canada had set at Vancouver 2010.

Norway's Tore Oevreboe is not surprised by the country's success at the Winter Games.

"There are quite a few reasons why we're a superpower in the winter sports. It has something to do with the format of the competitions," he told Reuters before the record fell.

"We're good at sports with many events that make it possible to take many medals, if you're good at those sports and have quite a few athletes that are at a top level in those sports."

The knowledge of how Norway achieves its victories is minutely analyzed and shared.

"At the top level, we are very, very professional. We have very professional national teams and we are working closely together with the national teams, working across the sports, so they learn from each other."

The Norwegians also had a long-term approach when taking the altitude at the 2022 Games into account.

"Some of the sports have chosen to do much more of their basic physical work at high altitude than others," Oevreboe said.

"From my experience, as a coach and also a former athlete, I think it's very important to spend many, many, many weeks and days, even months, at high altitude the last two or three years before you have a competition at higher altitude."

For Oevreboe, Norway's gold medals are a result of many factors and he is well aware things can change quickly in sport.

"Sometimes the competition is tougher than you think, then you will feel more disappointed than when the competition is a little bit lower than maybe expected," he said.

"Then they feel more happy. But we are very proud on the performance side of it, so we try to analyze what is what, and we try to develop even when we are at the top level."