Detecting Prolonged Sitting Bouts with the ActiGraph GT3X.

07:00 EST 19th November 2019 | BioPortfolio

Summary of "Detecting Prolonged Sitting Bouts with the ActiGraph GT3X."

The ActiGraph has a high ability to measure physical activity, however, it lacks an accurate posture classification to measure sedentary behaviour. The aim of the present study was to develop an ActiGraph (waist-worn, 30Hz) posture classification to detect prolonged sitting bouts, and to compare the classification to proprietary ActiGraph data. The activPAL, a highly valid posture classification device, served as reference criterion. Both sensors were worn by 38 office workers over a median duration of 9 days. An automated feature selection extracted the relevant signal information for a minute based posture classification. The machine-learning algorithm with optimal feature number to predict the time in prolonged sitting bouts (≥5 and ≥10 minutes) was searched and compared to the activPAL using Bland-Altman statistics. The comparison included optimised and frequently used cut-points (100 and 150 counts-per-minute (cpm), with and without low-frequency-extension (LFE) filtering). The new algorithm predicted the time in prolonged sitting bouts most accurate (bias ≤7 minutes/day). Of all proprietary ActiGraph methods, only 150 cpm without LFE predicted the time in prolonged sitting bouts non-significantly different from the activPAL (bias ≤18 minutes/day). However, the frequently used 100 cpm with LFE accurately predicted total sitting time (bias ≤7 minutes/day). To study the health effects of ActiGraph measured prolonged sitting, we recommend using the new algorithm. In case a cut-point is used, we recommend 150 cpm without LFE to measure prolonged sitting, and 100 cpm with LFE to measure total sitting time. However, both cpm cut-points are not recommended for a detailed bout analysis.


Journal Details

This article was published in the following journal.

Name: Scandinavian journal of medicine & science in sports
ISSN: 1600-0838


DeepDyve research library

PubMed Articles [2917 Associated PubMed Articles listed on BioPortfolio]

Google fit smartphone application or Gt3X Actigraph: Which is better for detecting the stepping activity of individuals with stroke? A validity study.

To examine the validity of the GT3X ActiGraph accelerometer and the Google Fit smartphone application in estimating stepping activity in people with chronic stroke.

Effects of Frequency and Duration of Interrupting Sitting on Cardiometabolic Risk Markers.

Interrupting prolonged sitting with short multiple bouts of moderate-intensity physical activity (PA) can improve postprandial cardiometabolic risk markers. This study examined the effect of high and ...


Prolonged sitting has been shown to promote endothelial dysfunction in the lower legs. Further, it has been reported that simple sitting-interruption strategies, including calf raises, prevent leg end...

Is sitting invisible? Exploring how people mentally represent sitting.

Growing evidence suggests that prolonged uninterrupted sitting can be detrimental to health. Much sedentary behaviour research is reliant on self-reports of sitting time, and sitting-reduction interve...

Agreement Between GT3X Accelerometer and ActivPAL Inclinometer for Estimating and Detecting Changes in Different Contexts of Sedentary Time Among Adolescents.

This investigation aimed to analyze the agreement between the GT3X accelerometer and the ActivPAL inclinometer for estimating and detecting changes in sedentary behavior of different contexts among ad...

Clinical Trials [2303 Associated Clinical Trials listed on BioPortfolio]

An Intervention to Reduce Prolonged Sitting in Police Staff

The primary aim of this study is to assess the feasibility of an intervention to reduce and break up prolonged sitting time in full-time police staff. The secondary aims of this study are ...

The Effects of Reducing Prolonged Sitting Bouts in Individuals at High Risk of or With Type 2 Diabetes

Over 3 million in the United Kingdom are now diagnosed with type 2 diabetes, with current estimates suggesting this will rise to over 5 million by 2025. Type 2 diabetes increases the risk ...

Effects of Breaking up Prolonged Sitting on Postprandial Cardiometabolic Disease Risk Markers in South Asian Adults

The purpose of this study is to examine whether breaking up prolonged sitting with short regular bouts of walking can reduce blood sugar and cholesterol levels after eating, which are risk...

Health Effects of Increasing Muscle Activation While Sitting in Office Workers

Previous research suggests that prolonged sitting increases risk for cardiometabolic diseases and the risk factors associated with cardiometabolic diseases. However, no study to date has e...

A Comparison of Accelerometers for Measuring Daily Activity in Sarcoid

This cross-over study of 12 patients with sarcoidosis will look at two different widely-used accelerometer devices. These devices are wrist worn and similar in size to a wrist-watch. They ...

Medical and Biotech [MESH] Definitions

A condition characterized by mucosal tears at the ESOPHAGOGASTRIC JUNCTION, sometimes with HEMATEMESIS. Typically it is caused by forceful bouts of retching or VOMITING.

Therapy of sitting in a hot steamy room followed by a cool bath or shower.

A condition of the feet produced by prolonged exposure of the feet to water. Exposure for 48 hours or more to warm water causes tropical immersion foot or warm-water immersion foot common in Vietnam where troops were exposed to prolonged or repeated wading in paddy fields or streams. Trench foot results from prolonged exposure to cold, without actual freezing. It was common in trench warfare during World War I, when soldiers stood, sometimes for hours, in trenches with a few inches of cold water in them. (Andrews' Diseases of the Skin, 8th ed, p27)

A term used to describe pregnancies that exceed the upper limit of a normal gestational period. In humans, a prolonged pregnancy is defined as one that extends beyond 42 weeks (294 days) after the first day of the last menstrual period (MENSTRUATION), or birth with gestational age of 41 weeks or more.

One of three bones that make up the coxal bone of the pelvic girdle. In tetrapods, it is the part of the pelvis that projects backward on the ventral side, and in primates, it bears the weight of the sitting animal.

Quick Search

DeepDyve research library

Searches Linking to this Article