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Old 06-10-2011, 08:48 AM   #2
Deuce
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Join Date: Apr 2010
Location: Virginia
Posts: 1,717
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My gym has treadmills with this feature built in. I think it varies a little bit but it's just about the same thing. It is a great workout, and I feel more burnt out after one 20 min session like this than I do after a light jog of 40 mins.
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