By now we've heard that obesity is contagious. Well, the flip side of that is that healthy habits are contagious, too. Here's how to build and share those habits with everyone around you.
Research duo Nicholas Christakis and John Fowler recently discovered that the friends we choose tend be as genetically similar as our fourth cousins.
You’ve heard by now that you can “catch” obesity from your friends, family — even distant acquaintances. But you may have missed the flip side of that story: Good health and fitness are catching, too.