Add Yahoo as a preferred source to see more of our stories on Google. If you equate step aerobics with leg warmers and spandex, well, you're not wrong—but you're stuck in the 1980s version of it. As ...

Whether you easily hit 10,000 steps a day, or manage the more modest yet evidence-backed 7,000, hitting 17,000 may seem a bit of a reach. That's the number of steps hunter gathers used to hit a day, ...