What is the best way to do speed work when training to run a marathon?
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M$2 Answers
Jack Daniels' Running Formula.
http://books.google.com/books?printsec=frontcover&sig=hMxngUEp53gHZ23hT...
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M$You can leave an optional "tip" with Mahalo's virtual currency, Mahalo Dollars. If you are asking a difficult question that might require some research, or if you'd like a wide variety of feedback, a higher tip often leads to more answers to your question.
M$
I run with Team in Training and the coaches refer to Jack Daniels training technics.