title: Comparison of Different Physical Activity Measurement Methods in Adults Aged 45 to 64 Years Under Free-Living Conditions.
abstract: OBJECTIVE
  To compare physical activity (PA) measured by 4 methods in adults under free-living conditions in relation to selected demographic and anthropometric variables.
  
  
  METHODS
  Cohort study.
  
  
  METHODS
  Department of Sports Medicine.
  
  
  METHODS
  Clinically healthy men (81) and women (69) aged 45 to 64 years.
  
  
  METHODS
  Physical activity monitoring for 7 consecutive days under free-living conditions by pedometer (P) and accelerometer (A) simultaneously and PA questionnaires: International Physical Activity Questionnaire (IPAQ) and Seven-Day Physical Activity Questionnaire Recall (SDPAR) completed after the 7-day PA.
  
  
  METHODS
  Comparison of PA measured by pedometer, IPAQ, and SDPAR with accelerometer with regard to age, body mass, gender, and obesity type.
  
  
  RESULTS
  Total energy expenditure (EE) by IPAQ was higher than A (P < 0.001) in both groups regardless of age, body mass, or obesity type. Mean EE value by P was greater than A (P < 0.001) in central-obesity males and lower than A (P < 0.001) in central-obesity females. There were differences in step counts in women, unnoticed in men. SDPAR overestimated total EE in gynoid-obesity males and in central-obesity females compared with A. Ninety-five percent CI was the largest around IPAQ compared with P and SDPAR, with SDPAR showing the best agreement with A.
  
  
  CONCLUSIONS
  Body mass and obesity type influenced PA measurements. To monitor PA, it is recommended to use pedometer in normal bodyweight and overweight groups while accelerometer is advisable in obese subjects. A combined approach of objective and subjective PA monitoring tools is preferable.
authors.affiliation: Department of Sports Medicine, Medical University of Lodz, Lodz, Poland.
authors.forename: Anna
authors.initials: A
authors.lastname: Lipert
authors.forename: Anna
authors.initials: A
authors.lastname: Jegier
mesh_terms: D056044:Actigraphy / Q000295:instrumentation*; D015331:Cohort Studies; D015444:Exercise; D005260:Female; D000072936:Fitness Trackers; D006801:Humans; D008297:Male; D008875:Middle Aged; D009765:Obesity; D050177:Overweight; D011795:Surveys and Questionnaires