HotHardware: Exercise is important, there's no disputing that. It's especially critical if, like us, you spend hours each day plopped in front of a computer screen hammering out hardware reviews, TPS reports, or whatever. Activity is key to a healthy lifestyle, but how do you know if you're doing enough? In the old days, a mirror and scale would keep track of your progress. And today? Healthy living monitor gadgets like the Nike+ FuelBand are finding an audience among the health nuts, nouveau techno-geeks, and the upwardly connected set. But what you may not realize is that, as cool as these gadgets purport to be, you may be signing up for more than you bargained for.