University of Oulu

Tjurin, P., Niemelä, M., Kangas, M., Vähä-Ypyä, H., Sievänen, H., Jämsä, T., & Korpelainen, R. (2019). Accelerometry-Based Characteristics of Overall Sedentary Behavior and Sitting in Middle-Aged Adults. Measurement in Physical Education and Exercise Science, 23(3), 249–257.

Accelerometry-based characteristics of overall sedentary behavior and sitting in middle-aged adults

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Author: Tjurin, Petra1; Niemelä, Maisa1; Kangas, Maarit1,2;
Organizations: 1Research Unit of Medical Imaging, Physics and Technology (MIPT), University of Oulu, Oulu, Finland
2Medical Research Center, University of Oulu and Oulu University Hospital, Oulu, Finland
3UKK Institute for Health Promotion Research, Tampere, Finland
4Department of Diagnostic Radiology, Oulu University Hospital, Oulu, Finland
5Oulu Deaconess Institute, Department of Sports and Exercise Medicine, Oulu, Finland
6Center for Life Course Health Research, University of Oulu, Oulu, Finland
Format: article
Version: accepted version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
Persistent link:
Language: English
Published: Informa, 2019
Publish Date: 2020-11-12


The purpose of this study was to describe the accelerometry-based characteristics of overall sedentary behavior (SB) and sitting among adults under free-living conditions. Thirty-six (mean age 47.6 years) volunteers carried a waist-worn accelerometer for ≥4 days with data ≥600 min/d during 14 consecutive days. A machine learning (ML) based method was used to classify the patterns of SB and sitting from raw 3D acceleration. The participants spent most (69.3%) of their waking time in SB, and a half (52.2%) of the SB was performed in a sitting posture. Men broke their overall sedentary time less often (4.1 vs. 6.1 bouts/h), but women sat more; however, women broke their sitting time as often as men (7.6 bouts/h). This study confirms that SB and sitting can be distinguished using ML methods, and more information about SB can be achieved when overall SB and sitting are analyzed separately in free-living conditions.

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Series: Measurement in physical education and exercise science
ISSN: 1091-367X
ISSN-E: 1532-7841
ISSN-L: 1091-367X
Volume: 23
Issue: 3
Pages: 249 - 257
DOI: 10.1080/1091367X.2019.1613997
Type of Publication: A1 Journal article – refereed
Field of Science: 217 Medical engineering
315 Sport and fitness sciences
Funding: This work was in part financially supported by University of Oulu [Grant number 24000692], Oulu University Hospital [Grant number 24301140], ERDF European Regional Development Fund [Grant number 539/2010 A31592], and Ministry of Education and Culture, and Finnish Cultural Foundation.
Copyright information: © Taylor & Francis. This is an Accepted Manuscript of an article published by Taylor & Francis in Measurement in Physical Education and Exercise Science on 12th of May 2019, available online: