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Marco Cignini of Italy (L) and Hiroki Abe of Japan compete during the men's 500m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Sven Kramer of the Netherlands (L) skates next to Havard Bokko of Norway in the men's 1500m distance event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 17, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Havard Boekko of Norway (L) and Ivan Skobrev of Russia skate during the men's 5000m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Sven Kramer of the Netherlands competes during the 500m men's race at the World Speedskating Championships in the Viking Ship Arena in Hamar, central Norway February 16, 2013, in this picture provided by NTB Scanpix. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Sven Kramer of the Netherlands prepares for the 500m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Sun Longjiang of China skates during the 500m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Zbigniew Brodka of Poland skates during the men's 500m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Jan Blokhuijsen of the Netherlands skates during the men's 5000m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Zbigniew Brodka of Poland skates in the men's 1500m distance event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 17, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Bart Swings of Belgium skates in the men's 1500m distance event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 17, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Diane Valkenburg of the Netherlands skates during the women's 500m event at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 16, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Ireen Wust of the Netherlands, overall winner of the women's event, gestures during the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 17, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix

Sven Kramer, left, and Ireen Wust, both of the Netherlands, wearing their laurels as they parade after winning the overall titles in the World Speed skating Championships Sunday Feb. 17, 2013, in the Viking Ship Arena in Hamar, Central Norway. (AP Photo / Hakon Mosvold Larsen, NTB scanpix)

Ireen Wust of the Netherlands waves on the podium, after winning the overall women's title, next to second place winner Diane Valkenburg of the Netherlands (L) and third place winner Yekaterina Shikhova of Russia at the World Speedskating Championships in Hamar in this picture provided by NTB Scanpix February 17, 2013. REUTERS/Hakon Mosvold Larsen/NTB Scanpix