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A fitness tracker is worn on the body (or held, like an iPhone) to measure or estimate data points including step counts, calories burned, distance traveled, heart rate, sleep time or respiration.
A fitness tracker or activity tracker is an electronic device or app that measures and collects data about an individual's movements and physical responses, towards the goal of monitoring and improving their health, fitness, or psychological wellness over time.
How To Measure Your Body Composition. If you’re curious about your own body composition, there are plenty of ways to measure it. Each method offers varying levels of accuracy, ease, and ...
From tracking your REM sleep to counting every last step you take in a day, these trackers do it all.
The Fitbit Classic was a small black and teal device that could be clipped and worn 24/7. It uses a three-dimensional accelerometer to sense user movement. The Tracker measures steps taken as well as user data to calculate distance walked, calories burned, floors climbed, and activity duration and intensity.
More recent devices use optics to measure heart rate by shining light from an LED through the skin and measuring how it scatters off blood vessels. In addition to measuring the heart rate, some devices using this technology are able to measure blood oxygen saturation (SpO 2). Some recent optical sensors can also transmit data as mentioned above.