Can you trust your smartwatch when it tells you how many calories you burned? Researchers at Florida International University tested smartwatches from Apple, Garmin, Samsung, and Fitbit to determine how accurately they estimate calories burned during exercise. Participants exercised while wearing the smartwatches as researchers simultaneously measured their actual energy expenditure using laboratory equipment. The research found that the watches substantially misestimated calories burned, with inaccuracies increasing as body fat percentage increased. In this video, FIU researchers explain: • How smartwatch calorie estimates were tested • How the watches compared with laboratory measurements • Why body composition can affect calorie estimates • What the findings mean for people using fitness trackers • Why calorie numbers on wearable devices should be viewed as estimates rather than exact measurements The research offers new insight into the accuracy of wearable fitness technology ...