Study shows Apple Watch’s limited accuracy in calorie counting
By ForGeeks A new meta-study from the University of Mississippi has found: the Apple Watch accurately measures heart rate and steps, but is significantly wrong when calculating calories burned. Researchers analyzed 56 papers comparing the smart watch’s performance to benchmark measuring devices.
Precise metrics: heart rate and steps
According to our analysis, the Apple Watch’s heart rate and step counts are within acceptable margins of error. The average error in heart rate measurement was 4.43%, and the average error in step counting was 8.17%. An error rate below 10% is considered excellent, so users can trust this data.
The results make the Apple Watch a reliable companion for those who monitor activity and heart rate. However, as the study’s authors emphasize, accuracy depends on context: activity intensity, measurement conditions, and the wearer’s individual characteristics.
Accuracy depends on the context: activity intensity, measurement conditions, and the wearer’s personal characteristics.
The main problem is calorie counting
Serious inaccuracy was found in estimating the energy expended during activity. The error was 27.96%, making it highly unreliable. Apple Watch incorrectly calculates calories burned during walking, running, interval training, and even cycling.
The problem isn’t new. Previously, other studies have pointed to possible bias of up to 80 percent in calorie calculations on both the Apple Watch and other trackers, such as the Fitbit Surge. The errors are due to the limitations of sensors and algorithms that can’t account for all physiological variables.
How to treat this data
Specialists recommend using smartwatches not for accurate medical diagnosis, but as a tool to track overall trends. The devices help form healthy habits, but they don’t replace professional medical devices.
The Study shows Apple Watch’s limited accuracy in calorie counting was first published on ITZine.ru.
