Dean Karnazes Running on a Treadmill

Sometimes it seems like you run all day and never get anywhere. Ultra-marathoner Dean Karnazes can relate — the 44-year-old from San Francisco ran on a treadmill high above Times Square in New York from June 21 to 22, trying to break the world record of 154 miles in 24 hours.
But the intrepid exerciser wasn’t just doing it for his health — he is trying to raise $1 million for prostate cancer research. [source: In Touch]
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