Magnus Kim KOR leads the pack in the Cross-Country Skiing Men's Sprint Classic at Birkebeineren Cross-Country Stadium during the Winter Youth Olympic Games, Lillehammer Norway, 16 February 2016.

Thomas Helland Larsen NOR competes in the Cross-Country Skiing Men's Sprint Classic at Birkebeineren Cross-Country Stadium during the Winter Youth Olympic Games, Lillehammer Norway, 16 February 2016.

Thomas Helland Larsen NOR competes in the Cross-Country Skiing Men's Sprint Classic at Birkebeineren Cross-Country Stadium during the Winter Youth Olympic Games, Lillehammer Norway, 16 February 2016.

Marit Bjoergen of Norway skis during the Cross-Country Skiing Ladies' 10 km Free on day six of the PyeongChang 2018 Winter Olympic Games at Alpensia Cross-Country Centre on February 15, 2018 in Pyeongchang-gun, Republic of Korea.

Charlotte Kalla of Sweden skis during the Cross-Country Skiing Ladies' 10 km Free on day six of the PyeongChang 2018 Winter Olympic Games at Alpensia Cross-Country Centre on February 15, 2018 in Pyeongchang-gun, Republic of Korea.

Ragnhild Haga of Norway celebrates winning the Cross-Country Skiing Ladies' 10 km Free on day six of the PyeongChang 2018 Winter Olympic Games at Alpensia Cross-Country Centre on February 15, 2018 in Pyeongchang-gun, Republic of Korea.

Krista Parmakoski of Finland skis during the Cross-Country Skiing Ladies' 10 km Free on day six of the PyeongChang 2018 Winter Olympic Games at Alpensia Cross-Country Centre on February 15, 2018 in Pyeongchang-gun, Republic of Korea.

Cross-Country skiers start in the Men's 15km and 15km Skiathlon Cross-Country Skiing on Day 2 of the PyeongChang 2018 Winter Olympic Games at Alpensia Cross-Country Centre on February 11, 2018 in Pyeongchang-gun, Republic of Korea.

Denis Spitsov of Olympic Athlete from Russia competes during the Cross-Country Skiing Men's 15km Free at Alpensia Cross-Country Centre on February 16, 2018 in Pyeongchang-gun, Republic of Korea.

Norway Team during the Cross Country Skiing 4x10km relay Men medal ceremony at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.