Mary Keitany success in London and marathon training at ING New York City Marathon

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At the 2011 London Marathon, Mary Keitany became the first women in 3 years to run under 2:20 in the marathon. The time came in only her second marathon ever which came after her 2:29 debut at the 2010 New York City Marathon. Keitany discuss her success in London and her marathon training which includes weekly 35-40k long runs on Fridays.