Physical activity in epidemiology: moving from questionnaire to objective measurement.

摘要

The most important contribution of activity monitors to epidemiology is their ability to measure routine, moderate activities such as walking. Measuring moderate intensity movement is a challenge because of the need to assess many activities of short duration that occur as part of everyday tasks in situations that vary. Yet these are exactly the activity patterns promoted in current national and international guidelines, all of which emphasise the accumulation of relatively short episodes of moderate intensity physical activity within daily routines.