HOW DOES MY CHARGE HR OR SURGE TRACK MY HEART RATE? When your heart beats, your capillaries expand and contract based on blood volume changes. PurePulse™ LED lights on your tracker reflect onto the skin to detect blood volume changes and finely tuned algorithms are applied to measure heart rate automatically and ...
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This £50 monitor is a cross between the Nike FuelBand and Fitbit One, and is almost what we wish the Fitbit Flex had been. Here's our Archos Activity Tracker review. Activity tracker OLED display: 22.4x5.6mm with blue backlight Tracks: steps time calories burned and walking distance 7 days' ...
The Fitbit Force was our favorite fitness tracker of 2013 next to the Jawbone Up24, but it suddenly disappeared early this year, recalled due to skin rash reactions. Good news: the Fitbit Charge is the Fitbit Force reborn. It's actually even improved: the band has a better snap-on wristband, and Fitbit's firmware now ...
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