Study on the compatibility and validity for the estimation in amount of physical activity and energy expenditure. - Physical activity estimation study

Although wearable devices for estimating energy expenditure are becoming increasingly popular, there is little evidence regarding their validity. The wearable devices that we tested were able to rank daily total energy expenditure between individuals, but absolute values differed widely among devices and varied significantly from the gold standard measures. Furthermore, all wearable devices underestimated total energy expenditure under free-living conditions.