You may have heard the saying, “Sitting is the new smoking,” referring to the damage that prolonged sitting does to mental and physical health. (Check out the book Deskbound: Standing Up to a Sitting World, and you’ll never want to do a two-hour stretch in a chair again.) How bad is sitting? According to the Mayo Clinic, sitting more than four hours a day can raise risk of cardiovascular disease by about 125 percent. But unless your business involves training athletes, employees probably have to spend a lot of time sitting at desks and staring at screens.