Why is 10,000 steps a magic number for health?

Posted at 5:17 PM, Dec 23, 2015
and last updated 2015-12-23 17:17:36-05

If you have a Fitbit, or know someone who uses one, you've no doubt heard them trying to hit 10,000 steps a day.

That's equal to about 5 miles.

Our Chief Health Editor Dr. Partha Nandi has more on that magic number in the video player above.