title: Context of Physical Activity in a Representative Sample of Adults.
abstract: OBJECTIVE
  The establishment of formal physical activity (PA) guidelines has led to considerable interest in quantifying participation in moderate to vigorous PA (MVPA). However, evidence on the context of MVPA at the population level is scarce. The aim of this study was to provide information on the type, location, and purpose of MVPA in a representative sample of adults.
  
  
  METHODS
  Data from a representative sample of 1234 Iowa adults were included in this study. Each participant performed a telephone-administered 24-h PA recall method to recall PA in the previous 24 h. Self-reported data from the recall instrument included time and types of reported activities across five distinct location and purpose codes. Reported activities were matched with corresponding metabolic equivalent (MET) scores from a reduced list of compendium of physical activities. MVPA was defined as any activity with assigned MET ≥ 3.0.
  
  
  RESULTS
  Of the top 30 most frequently reported MVPA, 16 were lifestyle activities involving walking, and only 4 can be regarded as traditional "exercises." Occupational activities (41% for purpose and 40% for location) and household activities (37% for purpose and 39% for location) accounted for nearly 80% of total reported MVPA time. Time allocations across purpose and location codes considerably differed by sociodemographic indicators.
  
  
  CONCLUSIONS
  Lifestyle activities are more frequently reported than sports and/or recreational activities. Individuals with varying levels of sociodemographic indicators exhibit different patterns of use of time within a given day. A multidomain approach is needed to better understand and increase MVPA in diverse populations of US adults.
authors.affiliation: Department of Kinesiology, Iowa State University, Ames, IA.
authors.forename: Gregory J
authors.initials: GJ
authors.lastname: Welk
authors.forename: Youngwon
authors.initials: Y
authors.lastname: Kim
mesh_terms: D000203:Activities of Daily Living; D000328:Adult; D015444:Exercise; D006801:Humans; D007484:Iowa; D008019:Life Style; D011939:Mental Recall; D009043:Motor Activity; D057185:Sedentary Behavior; D012959:Socioeconomic Factors; D011795:Surveys and Questionnaires; D013689:Telephone