Differentiating Sitting and Lying Using a Thigh-Worn Accelerometer.
A triaxial accelerometer worn on the thigh can provide information on the angle of rotation of the thigh. These data may be used to estimate periods of lying versus sitting. Purpose: To develop and test a classification algorithm to identify sedentary events as either lying or sitting events using a...
| Publicado en: | Medicine & Science in Sports & Exercise Vol. 48; no. 4; pp. 742 - 748 |
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| Autores principales: | , , , |
| Formato: | pictorial research tables/charts Journal Article |
| Publicado: |
Lippincott Williams & Wilkins
Apr2016
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| Acceso en línea: | Ver este registro en EBSCOhost |
| fields | @attributes: recordID: 1 pdfLink: plink: https://search.ebscohost.com/login.aspx?direct=true&db=ccm&AN=113860437&site=ehost-live header: @attributes: shortDbName: ccm uiTerm: 113860437 longDbName: CINAHL Complete uiTag: AN controlInfo: bkinfo: dissinfo: jinfo: jid: 01959131 4DP jtl: Medicine & Science in Sports & Exercise issn: 01959131 maglogo: N pubinfo: dt: Apr2016 vid: 48 iid: 4 pid: 433 pub: Lippincott Williams & Wilkins place: Baltimore, Maryland artinfo: ui: 113860437 113860437 113860437 10.1249/MSS.0000000000000804 113860437 ppf: 742 ppct: 6 formats: tig: atl: Differentiating Sitting and Lying Using a Thigh-Worn Accelerometer. aug: au: LYDEN, KATE JOHN, DINESH DALL, PHILIPPA GRANAT, MALCOLM H. affil: Division of Endocrinology, Metabolism, and Diabetes, University of Colorado, Anschutz Medical Campus, Aurora, CO sug: subj: Sitting Evaluation Polysomnography Sedentary Behavior Evaluation Accelerometry Methods Human Thigh Accelerometers Utilization Self Report ab: A triaxial accelerometer worn on the thigh can provide information on the angle of rotation of the thigh. These data may be used to estimate periods of lying versus sitting. Purpose: To develop and test a classification algorithm to identify sedentary events as either lying or sitting events using a thigh-worn, triaxial accelerometer. Methods: Seven-day free-living activity from 14 sedentary workers was recorded using the activPAL™ monitor. Participants recorded when they went to bed and when they got up in a diary. All "in-bed" sedentary events were assumed to be lying and all "not-in-bed" sedentary events as sitting. An algorithm computed the angle of rotation of they-axis, which was used to detect orientation of the thigh. Crossing a rotational threshold in the transverse plane of ±65- was used to classify a sedentary event as lying. The classification accuracy of the algorithm was compared with self-reported classification from the diary. Results: The algorithm classified 96.7% of the sedentary time ''in bed'' (sensitivity) as lying and 92.9% of the time ''not in bed'' as not lying (specificity). Conclusions: Triaxial accelerometer data recorded from a single site on the thigh can be used to classify sedentary events as sitting and lying. The automated method developed in this study will allow objective measurement of diurnal lying time and that while sleeping without relying on self-report. This will help advance the understanding of the impact of different types of sedentary behaviors on various health outcomes. pubtype: Academic Journal doctype: pictorial research tables/charts Journal Article ougenre: Article language: English refInfo: holdings: @attributes: islocal: N |
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