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In a paper published in January, researchers sought to assess the role of wrist-worn smart devices in tracking energy expenditure and heart rate. Using Apple Watch Series 6, Polar Vantage V and Fitbit Sense, 30 healthy male and female participants engaged in weight training, cycling, running, walking and even sitting. As reference equipment, the team used a Polar H10 chest strap and MetaMax 3B.
Wearables are even more inconsistent for those with below-average and above-average energy expenditures. The study also appears to be consistent with previous studies that have attempted to assess the same abilities but using different wrist-worn devices.
The good news is that the Apple Watch Series 6 is fairly reliable at tracking heart rate data across all exercise conditions, and the accuracy of the Polar Vantage V and Fitbit Sense wearables fluctuates based on exercise. Step counts also appeared to be relatively consistent across all devices involved in the study.
Despite its limitations, such as the small sample size of devices and individuals, this study appears to be consistent with previous research showing that smart watches and wrist-worn fitness trackers on the market do not contribute to your daily energy Consumption provides a reliable measure. Furthermore, their results are inherently very unpredictable.
Still, heart rate tracking and step counting are generally fairly useful and reliable features. In fact, some studies suggest that smart wearables alone may introduce a positive impact on a person’s fitness life. People who use smart wearables tend to increase their overall activity and step count.
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