I worked the fitness convention in San Francisco last week. The company I worked for was Sproing! It's a treadmill that's not a treadmill. Easier on the joints and low impact. You strap into a harness and run on a cushy pad, you can vary resistance of the harness and firmness on the pad making it harder or easier. Very interesting concept, they have done a lot of research and it works!...wanna sproing?
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