Smart Clocks are Not Good at Measuring Calories

If you use a smart watch or activity tracker to measure the calories you spend throughout the day, it may be time to think about a new alternative.As the BGR reports , researchers at Stanford University have found that when it comes to measuring energy burning, these products disappoint.

In order to carry out the study, the researchers tested seven devices on 60 volunteers: Apple Watch, FitBase Surge 2, Microsoft Band, Basis Peak, Samsung Gear S2, PulseOn and Mio Alpha 2 were used in different situations along with professional measuring equipment.

The results showed that the heart rate determined by the clocks was compatible with that obtained by the professional meter, with the exception of Gear S2, which recorded different numbers of the rest of the devices.

When it came time to measure energy expenditure, however, none of the devices showed precision, nor could it meet the expected error rate, which is 25%.The highest rate was presented by PulseOn, with a rate of 92.6%.In second place appeared the Apple Watch, with error rate of 40%, followed by the Microsoft Band, with 33%.Who approached more of the ideal was the Fitbit Surge, with a 27% chance of presenting wrong values.