What they say and what they do: comparing physical activity across U.S., England, and the Netherlands

Background: Physical Activity (PA) is important for maintaining health, but there are fundamental unanswered questions on how best it should be measured. Methods: We measured PA in the Netherlands (n=748), United States (n=540), and England (n=254), both by a 7 day wrist worn accelerometer and by self-reports. The self-reports included a global self-report on PA; and a report on the frequency of vigorous, moderate, and mild activity. Results: The self-reported data showed only minor differences across countries and across groups within countries (such as different age groups or working versus... Mehr ...