ActiGraph GT3X determined variations in “free-living” standing, lying, and sitting duration among sedentary adults

• Published in: Journal of sport and health science 2013-12, Vol.2 (4), p.249-256
• Main Authors: Barwais, Faisal A., Cuddihy, Thomas F., Rachele, Jerome N., Washington, Tracy L.
• Format: Article
• Language: English
• Subjects: Anatomical position; Inclinometer function; Obesity; Overweight; Sedentary behavior
• ISSN: 2095-2546; 2213-2961
• DOI: 10.1016/j.jshs.2013.06.003

Overweight and obesity has become a serious public health problem in many parts of the world. Studies suggest that making small changes in daily activity levels such as “breaking-up” sedentary time (i.e., standing) may help mitigate the health risks of sedentary behavior. The aim of the present study was to examine time spent in standing (determined by count threshold), lying, and sitting postures (determined by inclinometer function) via the ActiGraph GT3X among sedentary adults with differing weight status based on body mass index (BMI) categories. Participants included 22 sedentary adults (14 men, 8 women; mean age 26.5 ± 4.1 years). All subjects completed the self-report International Physical Activity Questionnaire to determine time spent sitting over the previous 7 days. Participants were included if they spent seven or more hours sitting per day. Postures were determined with the ActiGraph GT3X inclinometer function. Participants were instructed to wear the accelerometer for 7 consecutive days (24 h a day). BMI was categorized as: 18.5 to