The 11 Fittest Moments of 2011

#10: Paula Radcliffe Loses World Record to Herself

Britain's famous runner was stripped of her world record this year after the International Association of Athletics Federations passed a new rule stating females who race with male pacers run unnaturally faster than if they had ran the race alone or with a female pacer -- which voided all female records set with male pacers. Radcliffe ran the 2003 London Marathon in 2:15:25 -- the fastest time ever ran by a woman (but with male pacers). Radcliffe's former record is now considered "world's best" and the new record went to the next fastest time, which was Radcliffe again for her time at the 2005 London Marathon of 2:17:42. Oh, irony.