title: Detecting bouts of physical activity in a field setting.
abstract: The purposes of this study were to assess the TRITRAC and CSA for: (a) interaccelerometer agreement; (b) agreement in detecting patterns of moderate-intensity physical activity; and (c) agreement in detecting walking patterns recorded in a diary. Thirty-one women wore both the TRITRAC and CSA accelerometers for three consecutive days. Interaccelerometer agreement (measured with generalizability coefficients) ranged from .88 to .99. In total, 71.3% of the accelerometers' patterns agreed in length, with CSA patterns being on average significantly longer. Interaccelerometer agreement in detecting patterns of brisk walking, as recorded in a diary, was comparable (69.4%). Interaccelerometer discrepancies may be related in part to the threshold employed by each instrument for classifying moderate intensity patterns.
authors.affiliation: Department of Behavioral Sciences at the University of Texas-Houston, USA. LMASSE@utsph.uth.sph.tmc.edu
authors.forename: L C
authors.initials: LC
authors.lastname: Mâsse
authors.forename: J E
authors.initials: JE
authors.lastname: Fulton
authors.forename: K L
authors.initials: KL
authors.lastname: Watson
authors.forename: K C
authors.initials: KC
authors.lastname: Heesch
authors.forename: H W
authors.initials: HW
authors.lastname: Kohl
authors.forename: S N
authors.initials: SN
authors.lastname: Blair
authors.forename: S R
authors.initials: SR
authors.lastname: Tortolero
mesh_terms: D000328:Adult; D015444:Exercise; D005260:Female; D015438:Health Behavior; D006801:Humans; D008499:Medical Records; D008875:Middle Aged; D015203:Reproducibility of Results; D016138:Walking