Just heard about this thing…seems to be a useful product to help people get a better understanding of their own personal fitness. Very reasonably priced too…check it out.
How does the Fitbit Tracker work and what does it track?
The Fitbit Tracker contains a motion sensor like the ones found in the Nintendo Wii. The Tracker senses your motion in three dimensions and converts this into useful information about your daily activities. The Tracker measures the intensity and duration of your physical activities, calories burned, steps taken, distance traveled, how long it took you to fall asleep, the number of times you woke up throughout the night and how long you were actually asleep vs just lying in bed. You can wear the Tracker loosely in your pocket or clipped to your clothing, even bras.
How accurate is the Fitbit Tracker?
Calorie data from the Tracker is very similar to those from energy expenditure measurement devices used in clinical research. The Tracker will give you a good sense of how your activity levels change from day to day.
The Tracker is also one of the most accurate pedometers. We’ve tuned the accuracy of the Fitbit step counting functionality over hundreds of tests with multiple different body types. For most wearers, the Fitbit should be roughly 95-97% accurate for step counting. We spent a lot of time ensuring that this accuracy is achieved even when you wear the Fitbit loosely in your pocket.
Sleep data from the Tracker correlates very strongly with results from polysomnograms found in sleep labs.