Correspondence to Dr Richard P Troiano, Risk Factor Monitoring and Methods Branch, Applied Research Program, National Cancer Institute, NCI Shady Grove, 9609 Medical Center Dr, MSC 9762, Bethesda, MD ...
Objective Self-reports of physical activity (PA) have been the mainstay of measurement in most non-communicable disease (NCD) surveillance systems. To these, other measures are added to summate to a ...
The technology in fitness trackers is changing the way researchers study exercise, allowing them to gather much more detailed information about how people move throughout the day, experts say. The ...
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