Stanford researchers tested how well the wearable electronic device, take into account the heart rate and calorie consumption

Interest in smart watches and smart watch is largely due to the desire of users to live a healthy lifestyle that involves taking into account such factors as the distance traveled during the day, heart rate, sleep time and calorie consumption.

Experts from Stanford University tested how accurately to measure these indicators of modern wearable devices. With the help of 60 volunteers of different age and physique, researchers have studied the work of seven devices: Apple Watch, Basis Peak, Fitbit Surge, Microsoft Band, Mio Alpha 2, PulseOn and Samsung Gear S2.

In the process of training on the Ergometers and a treadmill readings given by the devices were compared with the readings of medical devices.

As it turned out, a pulse, all the devices measure precisely enough — six of them, the error does not exceed 5%, which meets the requirements to medical devices.

But with regard to the accounting of calories, rely on the indications of fitness bracelets and smart watches is not worth it. In the best case recorded was a discrepancy with the medical equipment by 27%, at worst 93%. Note that the highest accuracy showed the device the Apple Watch and Fitbit Surge.

Source: Stanford University

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