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Products like the Apple Watch and the Fitbit Charge HR use optical heart rate monitoring, which flashes light on the skin to track blood flowing through the capillaries below. This approach has a few well-known shortcomings. Darker skin pigments and ambient light can confound the sensors. Sometimes, capillaries at the wrist don’t accurately reflect what’s going on at the heart.
Jawbone’s using a different technology, developed in-house with the help of Body Media, a sensor tech startup it acquired last year. The approach is based on something called bioimpedance. Instead of relying on light sensors, it sends a small electrical current through the body and measures tissue’s resistance to it.
At launch, Jawbone will use the new sensors (in addition to the accelerometer from the previous model) to track resting heart rate, which the company says it can monitor with accuracy comparable to clinical-grade devices. But the sensors could unlock other signals, which Jawbone hopes to tap into with over-the-air updates starting next year. These include moment-to-moment heart rate, respiration, hydration and galvanic skin response. Eventually, Jawbone thinks it will be able to biometrically monitor things like stress and fatigue.

shmantrik писал(а):LeoV вы еще гири на ногах носить предложите....

shmantrik писал(а): вот я когда поднимаюсь на Грауз, особенно по несколько раз,

LeoV писал(а):Paw, а вы что делаете для поддержания формы?

paw писал(а):Я мало ем, но не специально, просто не хочется.