![The new Fitbit Charge 3 features 24/7 heart rate so you can track calorie burn more accurately, optimize your workouts and un… | Fitbit, Fitbit charge, Fun workouts The new Fitbit Charge 3 features 24/7 heart rate so you can track calorie burn more accurately, optimize your workouts and un… | Fitbit, Fitbit charge, Fun workouts](https://i.pinimg.com/originals/21/a6/27/21a627d72772cf48695fbb8899665735.png)
The new Fitbit Charge 3 features 24/7 heart rate so you can track calorie burn more accurately, optimize your workouts and un… | Fitbit, Fitbit charge, Fun workouts
![Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge](https://cdn.vox-cdn.com/thumbor/mcI4w6aoxTDgNdo4D3KBl5qKk6M=/0x0:2040x1360/1400x1400/filters:focal(857x517:1183x843):format(jpeg)/cdn.vox-cdn.com/uploads/chorus_image/image/51333271/DSCF5750.0.0.jpg)
Fitness trackers aren't very accurate at measuring heart rate — and that can be dangerous - The Verge
![Amazon.com: Tensea Compatible with Fitbit Charge 3 and Charge 4 Screen Protector, 2 Packs Soft TPU Bumper Full Around Case Cover Protector for Fitbit Charge 3/3 SE and Fitbit Charge 4 (Blue and Clear) : Electronics Amazon.com: Tensea Compatible with Fitbit Charge 3 and Charge 4 Screen Protector, 2 Packs Soft TPU Bumper Full Around Case Cover Protector for Fitbit Charge 3/3 SE and Fitbit Charge 4 (Blue and Clear) : Electronics](https://m.media-amazon.com/images/I/51Mb-Wx0sLL._AC_SX569_.jpg)