Blame the RPG's. After a generation of character building and class development in video games, quantifying our own personal stats has become as second nature as Second Life. And with these handy apps and gadgets at your disposal, you'll be power leveling through your days in no time.
Keeping tabs on your relative level of fitness has come a long way since the days of counting calories and pager-sized pedometers. These days, a new generation of wearable fitness trackers like the Nike Fuelband, Jawbone Up, and Fitbit Force will count everything from the number of steps taken in a day to your average heart rate and blood oxygenation levels—even how much and how well you sleep. The raw data gathered by the devices is then processed into actionable information by the device's associated mobile app. If you're looking to purchase a tracker, the Fitbit Force is your best bet.