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Susan Lacke takes her running up a few levels by tower running the Empire State Building. Let Susan inspire you to push your own boundaries in this chapter from her new book.

Do Shoes Matter?

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The theory that shoes cause most biomechanical problems has been proven wrong.

Are You Ready to Run Your First Marathon?

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Use this flow chart to assess if you're ready to start marathon training and what your next step should be.

Biggest Training Mistakes in Ultrarunning

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Are you training the wrong way for ultramarathon? Jason Koop is head of coaching at CTS and shares the top four training mistakes he sees ultrarunners make.

Running with Power

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Lose Weight Slowly

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One pound of fat is equal to 3,500 cal­ories, so for every pound of fat you want to lose, you need to create a caloric deficit of 3,500. Based on what we know about calories in versus calories out, this deficit can’t be achieved in a day, or even a few days.