Charlotte Kalla competing at the 2010 Vancouver Olympic Winter Games. Copyright : 2010 / CIO / John HUET - All rights reserved.

Charlotte Kalla of Sweden competes in the Women's 10km Classic

Charlotte Kalla of Sweden competes in the Women's 10km Classic

Charlotte Kalla competing Cross Country Skiing 10km Women at the 2010 Vancouver Olympic Winter Games. © 2010/IOC/John Huet - All rights reserved.

Vancouver 2010 Olympic Winter Games: Charlotte Kalla (SWE) during the 4 x 5km cross country skiing relay at the Whistler Olympic Park. Copyright : Getty/Alexander-Hassenstein

Vancouver 2010 Olympic Winter Games: Charlotte Kalla (SWE) during the women’s team sprint semi-final at the Whistler Olympic Park. Copyright : Getty/Clive Rose

Charlotte Kalla competing Cross Country Skiing 10km Women at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

Vancouver 2010 Olympic Winter Games: Charlotte Kalla (SWE) during the women’s team sprint semi-final at the Whistler Olympic Park. Copyright : Getty/Clive Rose

Charlotte Kalla competing Cross Country Skiing 10km Women at the 2010 Vancouver Olympic Winter Games. © 2010/GETTY - All rights reserved.

(L-R) Silver medalist Charlotte Kalla of Sweden, gold medalist Justyna Kowalczyk of Poland and bronze medalist Therese Johaug of Norway celebrate during the medal ceremony for the Women's 10 km Classic