title: The validity of the Stanford Seven-Day Physical Activity Recall in young adults.
abstract: OBJECTIVE
  To evaluate the criterion validity of the 7-Day Physical Activity Recall (7D-PAR) and factors associated with reporting error, in a sample of moderately overweight, young adult men and women.
  
  
  METHODS
  Average total daily energy expenditure (TDEE) and physical activity energy expenditure (PAEE) from the 7D-PAR were compared with the same parameters assessed by doubly labeled water in 17 men, age = 23.9 +/- 3.8 yr, and 29 women, age = 23.3 +/- 4.6 yr, who volunteered to participate in a 16-month supervised aerobic exercise trial. PAEE was estimated from the 7D-PAR and from DLW [0.9 * TDEE -resting metabolic rate (RMR) (indirect calorimetry)]. In addition, peak oxygen uptake and percent body fat were obtained.
  
  
  RESULTS
  No significant differences in TDEE (kJ.d-1) were noted between the 7D-PAR (11825 +/- 1779) and DLW (11922 +/- 2516) for the complete sample (N = 46) or for men (7D-PAR = 13198 +/- 1638, DLW = 13885 +/- 2754) or women (7D-PAR = 11018 +/- 1323, DLW = 10771 +/- 1457. The mean PAEE from the 7D-PAR was not different from DLW in the total sample (7D-PAR = 3286 +/- 502, DLW = 3508 +/- 1863) as well as in men (7D-PAR = 3650 +/- 490, DLW = 3989 +/- 2461) and women (3073 +/- 377, DLW = 3223 +/- 1360). In a regression model, PAEE, peak oxygen uptake, gender and percent fat accounted for 86% of the reporting error in total daily energy expenditure when using the 7D-PAR.
  
  
  CONCLUSIONS
  The 7D-PAR provided a reasonable estimate of both the mean TDEE and PAEE in this sample; however, estimates of energy expenditure on an individual basis using the PAR were subject to considerable error.
authors.affiliation: Energy Balance Laboratory, University of Kansas, Lawrence, KS 66045, USA. rwashburn@ku.edu
authors.forename: Richard A
authors.initials: RA
authors.lastname: Washburn
authors.forename: Dennis J
authors.initials: DJ
authors.lastname: Jacobsen
authors.forename: Bakary J
authors.initials: BJ
authors.lastname: Sonko
authors.forename: James O
authors.initials: JO
authors.lastname: Hill
authors.forename: Joseph E
authors.initials: JE
authors.lastname: Donnelly
mesh_terms: D000293:Adolescent; D000328:Adult; D001823:Body Composition / Q000502:physiology; D001834:Body Water / Q000502:physiology; D004734:Energy Metabolism / Q000502:physiology; D005260:Female; D006306:Health Surveys; D006801:Humans; D008019:Life Style; D008297:Male; D009043:Motor Activity; D010101:Oxygen Consumption / Q000502:physiology; D012044:Regression Analysis; D015203:Reproducibility of Results; D017678:Sex Distribution