RON FRIEDMAN: This is one of the more interesting things that I uncovered when I was doing the research for the book is that the benefits of exercise– most of us, as you said, think of it as something that we do to look good, or maybe even to feel good, but what research is starting to show is that some of the strongest impacts of exercise are the immediate benefits it has for the way that we think. SARAH GREEN: And it’s funny, too, because as we’re talking here, I’m remembering we’re sort of focused today on what individual people can do, but in the book you have a lot of interesting examples of companies going to extreme lengths to actually force people to disconnect.