A treadmill desk is a great way to get in steps while getting work done

Before trying it herself, Nicole Tsong, left, learns the finer points  of exercising on a treadmill and getting work done at the same time. Here on the 34th floor of a downtown office building, she speaks with Chief Marketing Officer for Zillow Group, Amy Bohutinsky.

Sitting, in general, is terrible for you, experts say. Your spine, back, shoulders and hips get weak; it can cause illness; and most of us do it way too much.

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