One of the world's most popular exercise aids started out as punishment for convicts.
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The treadmill
Before Barassi, there was Frank "Checker" Hughes
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(Photo by Getty Images).
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(Photo by Getty Images).
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The "treadwheel" put prisoners to work in the early 1800s. (Photo by Getty Images).
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Aussie Davis-Cuppers hit the tready in 2010. (Photo by Getty Images).
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Treadmills in space. (Photo by Getty Images).
The treadmill
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Sep 18 2014 6:30AM
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