Atlas will track your heart rate with an optical sensor in contact with your wrist.
How does it work?
Your Atlas Wristband has a bleeding edge optical heart rate sensor designed right into the device shown in the image below. The capillaries in your wrist expand and contract based on the volume of blood in your vessels at any given time. First, Atlas Wristband emits light into the wrist, and measuring the amount of light reflected back by the blood in your capillaries. We use both green and amber LEDs to maximize accuracy across different skin shades.
The Atlas Wristband heart rate technology used is designed specifically for high motion environments, and works particularly well while resting, jogging, or running. The Atlas Wristband uses inertial motion sensors in combination with the heart rate sensor to cancel out these motions and provide an even more accurate reading. Our sensors are EKG accurate when resting, achieve accuracy comparable to a chest strap even when active.
How do I wear it for best results?
The positioning of the heart-rate sensor can govern the accuracy of the measurement results. The wristband technology is designed specifically for the wrist of the wearer. The ideal location of the sensor is approximately 3 finger-lengths proximal to the elbow on top of the wrist.
Ensure the sensor face (on the bottom of the sensor “medallion”, in the picture above) is lying directly against the skin with no gap. Also, for best results, tighten the strap such that the sensor module is stable and does not slide on the skin but also not too tight to constrict blood circulation. Less motion of the device relative to your wrist means a more accurate sensor.
The sensor will still perform when worn in positions near the recommended position (image above), however, the closer to the recommended position, the more likely the sensor is to perform accurately.
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