Objectives: This study evaluated the validity of a smart chair and corresponding smartphone app (chair&app) to measure sitting time and sitting interruptions against camera-derived observation and activPAL.
Methods: Belgian deskbound university employees (n = 28, 17 women, mean age 30 ± 7.5 years, mean BMI 22.1 ± 2.0 kg/m ) were provided with the chair&app in three conditions: a controlled condition (following a prescribed protocol), a free-living condition (conducting usual office work for 2 hours), and an extended free-living condition (conducting usual office work for three consecutive days). Total sitting time and the number of sitting interruptions were compared between the chair&app and criterion measures (camera observation and activPAL). Criterion validity was assessed using mean differences (95% CI) and intra-class correlation coefficients (ICC; 95% CI).
Results: In the controlled condition, mean sitting time and number of sitting interruptions differed between chair&app and camera observation by 2.7 (-2.4, 7.9) minutes and -8.0 (-10.4, -5.6) interruptions, respectively. For the free-living condition, there was good agreement between chair&app and camera observation for both sitting time (ICC: 0.74; 0.28, 0.93) and sitting interruptions (ICC: 0.68; 0.10, 0.91). For the extended free-living condition, there was excellent agreement between chair&app and activPAL for sitting time (ICC: 0.89; 0.49, 0.97). Meanwhile, there was poor agreement between chair&app and activPAL for sitting interruptions (ICC: 0.38; -0.04, 0.70).
Conclusions: Chair&app generally provided reliable measures of desk-based sitting. Consequently, chair&app might be useful as a self-monitoring tool in the workplace context. Further research is needed to explore its usefulness in reducing adults' desk-based sitting.
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http://dx.doi.org/10.1002/1348-9585.12033 | DOI Listing |
Time spend using smartphones is constantly increasing. Portability leads to postures that expose them to musculoskeletal disorders (MSDs). The aim was to study the effect of time of day (morning, afternoon, evening and night) on university students' postures when using their smartphones over the weekend and their link with MSD risk.
View Article and Find Full Text PDFActa Bioeng Biomech
June 2024
1Department of Rehabilitation Medicine, Southern Medical University Nanfang Hospital, Guangzhou, China.
: The purpose of this study was to quantify the impact of smartphone use while sitting on the toilet on the spinal flexion angles and the time effect. : Measurements of the spinal flexion angles in the sagittal plane were made by thirty participants while they sat on the toilet for 10 min, using a smartphone in either one, both, or neither hand. The individual's forehead, cervical, thoracic and lumbar spinal areas were each fitted with five different inertial motion sensors.
View Article and Find Full Text PDFWorld J Hepatol
January 2025
Department of Infectious Diseases, Copenhagen University Hospital, Hvidovre, Denmark.
Background: Chronic hepatitis B (CHB) affects > 300 million people worldwide. The combination of CHB and cardiometabolic co-morbidities increases the risk of liver-related morbidity and mortality. However, international guidelines for CHB treatment do not provide recommendations for follow-up examinations or treatment of patients with CHB and cardiometabolic comorbidities.
View Article and Find Full Text PDFClin Biomech (Bristol)
January 2025
Department of Rehabilitation, Saitama Medical University International Medical Center, 1397-1, Yamane, Hidaka-shi, Saitama 350-1298, Japan.
Background: We aimed to clarify the immediate effect of wearing the Omo Neurexa upper limb suspended orthosis (Ottobock Japan, Tokyo, Japan) on trunk muscle activity during seated tasks.
Methods: Fifteen participants with upper limb hemiparesis were included. Surface electromyography of the thoracic and lumbar erector spinae and the external oblique muscles was performed.
Phys Occup Ther Pediatr
January 2025
Physiotherapy Program, School of Health Sciences, Western Sydney University, NSW, Australia.
Aims: To assess the reliability of the Alberta Infant Motor Scale (AIMS) when conducted recorded telehealth sessions by novice and expert raters.
Methods: Ten assessors (six novice, four expert) independently rated recorded telehealth assessments of 23 neurodevelopmentally high-risk infants twice. Inter- and intra-rater reliability of subscale scores, total score and percentile rankings were determined.
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