Hansons Marathon Method is the best-selling performance marathon training program.
Competitive running is one of the most popular sports in America, with all-time record highs of 19 million runners finishing a running event in 2013.
Since 1990, the number of U.
race finishers has grown 300%.
American marathoning hit all-time highs in 2014.
The number of marathons in the U.
has increased 300% since 2000.
The number of marathoners has increased 56% over the same time.
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