The average runner will go through 2 pairs of sneakers while training for a marathon.
The age range of the majority of female marathon runners in the US is 25 - 29.
Less than one tenth of 1% of all Americans will complete a marathon in their lifetime.
Over 400,000 people in the US will run a marathon in 2009.
The average number of steps it takes the average woman to complete a marathon is 51,214.
The average woman burns 2,880 calories while running in a marathon.
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