I want to introduce you with a consumer health device called FitBit
Fitbit is a wireless consumer device which tracks fitness and sleep.
Everyone can wear this small device easily all over the day and even at night while sleeping.
The parameters regarding the holder are transmitted to Fitbit website automatically by wireless technology.
The holder can watch and investigate his own parameters constantly on the web.On the device itself there is ability to watch calories, walking distance through the day and steps.
As an Health 2.0 tool there are community and social networking features on the website beside the personal detailed parameters .
The current price for the tracker (device) is 99$ .
Some interesting quotes from the company site :
"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"
"The Fitbit is optimized for walking, running and general household/lifestyle activities and gives you a good general 24 hour picture of your day."