Assessing physical activity (PA) with wearable sensors in epidemiologic studies often requires initializing activity monitors at the study site and mailing them to participants. In these studies, it is important to discern true PA data from mail transit data. Typically, participants are asked to log the date and time they ...
Purpose Accelerometers could potentially be used to assess physical activity and sleep using the same monitor; however, two different positions are typically used for the assessment of physical activity and sleep (waist and wrist, respectively). The aim of this study is to evaluate the concordance between wrist- and waist-worn Actigraphs ...
Purpose To examine the test-retest reliability and criterion-related validity of the Yale Physical Activity Survey for Older Adults (YPAS) and Community Health Activities Model Program for Seniors (CHAMPS) survey to assess sedentary behavior (SB) in older adults. Methods Adults aged 65 years and older were recruited to participate in a larger ...
Prior measures of sedentary behavior have not systematically measured sedentary activities in multiple domains and over various routinely performed daily sedentary activities with a user-friendly device. The Sedentary Behavior Record (SBR) was designed to fill the gap in the literature in measuring sedentary behavior. The SBR is an adaptation of ...
Accelerometers have the advantage of providing objective measures of both physical activity performed at various intensities and of sedentary time. ActiGraph accelerometers are widely used, however with technological advancements new models are periodically released. The GT3X is the most recent model. Although research has shown previous ActiGraph models to ...
Purpose Self-reported physical activity (PA) has several challenges, including recall errors, social desirability, incomplete answers and misunderstanding of questionnaires. All of these affect PA estimates. To reduce recall errors, daily PA diaries have been used as a criterion for other types of PA questionnaires. The purposes of this study were ...
Although objectively measured assessments of Latin social dancing have been previously reported, dance-specific accelerometer value calibrations for the estimation of energy expenditure (EE), step count (SC), and the development of physical activity intensity cut-points have not yet been conducted. Purpose To value calibrate, cross-validate, and determine the reliability of a ...
Purpose The purpose of this study was to examine the validity of seven child-specific ActiGraph prediction equations/cut-points (Crouter vector magnitude 2-regression model (Cvm2RM), Crouter vertical axis 2RM (Cva2RM), Freedson, Treuth, Trost, Puyau and Evenson) for estimating energy expenditure (EE) and time spent in sedentary behaviors, light physical ...
Purpose To review recently published studies on the reproducibility, validity, and feasibility of motion sensors used to assess physical activity in healthy children and adolescents (2-l1 yr). Methods In October 2004, a systematic literature search in PubMed, EMBASE, and PsyclNFO was performed. This search has been updated in October 2007. In this ...
Abstract To analyze the intra- and inter-instrument reliability of the ActiGraph GT3X accelerometer using a vibration table on each orthogonal axis and at five frequencies of motion. Ten GT3X units were subjected to a specific vibration using a motorized vibration table along the vertical, horizontal right–left and ...