The possibility of using high-altitude buildings, buildings that simulate the stay of being at high altitude, has been debated. In Norway, the use of high-rise buildings was banned in 2002, but Marit Björgen believes that the ban should be lifted.

- I think you should open up for use. It is allowed in all other nations. It should be up to everyone whether you want to use it or not. When it is allowed internationally, I think Norway should open up to it, says Marit Björgen in Viaplay according to Aftenposten.

Staying at high altitude increases the number of oxygen transporting red blood cells and therefore the use of high altitude houses has been popular for racing seasons and major championships.

Opponents of the use claim that it pushes the boundaries of what is doping. However, the high-rise buildings are not on Wada's list of illegal activities.

The Sports Federation does not want to lift the ban

Björgen does not buy the doping argument.

- If high-altitude houses push the limits of doping, then one should have international regulation. Then you should ban it for everyone, she says.

The 40-year-old Norwegian made his debut in the 1999 World Cup but has never tested high-altitude houses himself. On two occasions, 2008 and 2015, the Norwegian ski association has discussed the use of high-altitude houses, but without changing the ban.

Petter Northug has previously been against high-altitude buildings, but now he has changed his mind because of the corona situation.

The Norwegian Sports Federation, on the other hand, does not want to lift the ban despite the current pandemic.

- It is not relevant to open up the use of high-rise buildings. The Corona situation does not change our position, says the chairman of the Norwegian Sports Federation Berit Kjöll.