A scientific investigation has challenged the accuracy of calorie expenditure data provided by smartwatches. The study compared devices from four of the largest brands on the market — Apple, Garmin, Samsung, and Fitbit — with a professional metabolic analyzer, considered the gold standard for energy expenditure measurements.
The results of the comparison revealed significant discrepancies between the values measured by smartwatches and those recorded by the professional medical equipment. Wearable devices appear to consistently underestimate the user's actual effort, presenting calorie burn numbers that do not match the reality of energy expenditure.
This discovery raises important questions about the reliability of health information that consumers use to manage their diet and exercise plans. Many users base important decisions on these data, which can affect both those trying to lose weight and athletes who monitor their performance.
The manufacturers have not yet publicly commented on the results of this investigation, but the scientific community has been warning about the need for consumers to be more cautious with the data provided by these devices, which, while useful, should not replace professional medical evaluations.
