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Your fitness tracker could be misleading you

Your heart rate may be accurate on your fitness tracker, but the number of calories burned is significantly wrong, according to new research from Stanford University. Apple Watch, Basis Peak, Fitbit Surge, Microsoft Band, Mio Alpha 2, PulseOn and Samsung Gear S2 were tested in a group of 60 people. The results showed that measuring heart rate had an error rate of less than 5% on six of the devices. But the study also found that none of the devices were accurate when measuring energy expenditure. The most accurate device was incorrect by 27% on average while the least accurate was off by 93%. Read the story.

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