Detecting bouts of physical activity in a field setting. |
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| Authors: | L C Masse J E Fulton K L Watson K C Heesch H W Kohl S N Blair S R Tortolero |
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| Institution: | Department of Behavioral Sciences at the University of Texas-Houston, USA. LMASSE@utsph.uth.sph.tmc.edu |
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| 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. |
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