The Accuracy Of A Smartphone To Measure Laboratory And Free-living Physical Activity

Accelerometers worn on the wrist or hip can be used to measure physical activity (PA) levels in free-living populations. Most modern smartphones also contain an inbuilt accelerometer but the capacity of this technology to accurately measure parameters of PA needs to be further established. PURPOSE: The primary objective of this study was to assess the validity of a popular smartphone to count steps and estimate energy expenditure (EE) during...