- I might have been satisfied with seven times, but if you want to do the challenge together with a former national team captain on cross-country skis, you do as he says, says Måns and laughs.

Måns Möller and Christer Skog have completed many challenges.

Among other things, they have cycled from coast to coast in the USA and they have cycled through Europe in record time.

The reason is to raise money for the Viggo foundation project.

A fund that will provide opportunities for children with neuropsychiatric disabilities to play sports on their own terms.

Möller and Skog have so far raised around two million kronor for the fund, which is named after Möller's son Viggo who has autistic syndrome with a mild developmental disorder.

So now the next challenge is to get from Sälen to Mora on skis ten days in a row.

Something that no one else has done before.

Hear Måns Möller talk about the challenge in the clip.