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Title: The association between objectively measured sitting and standing with body composition: a pilot study using MRI
Authors: Smith, Lee
Thomas, E.L.
Bell, J.D.
Hamer, Mark
Issue Date: 2014
Publisher: © The Authors. Published by BMJ Publishing Group Ltd.
Citation: SMITH, L. ... et al., 2014. The association between objectively measured sitting and standing with body composition: a pilot study using MRI. BMJ Open, 4 (6), e005476 doi:10.1136/bmjopen-2014-005476
Abstract: Objective To investigate the association between objectively measured sitting and standing, using a postural allocation technique, with MRI-assessed body composition. Design The present study was a cross-sectional pilot study. Setting Participants were examined at one centre located in London, UK. Participants Normal weight Caucasian women (30.9±6.1 years; body mass index (BMI), 22.9±3.4 kg/m2) with desk-bound occupations were recruited to minimise variability in body composition outcomes. A convenience sample of 12 women was recruited in January 2014 from University College London. Outcome measures For each participant a number of body composition variables were attained from a single whole-body MRI session. Main outcome variables included: total and liver adiposity, visceral/subcutaneous fat ratio and BMI. Main exposure variables included: average sitting time, standing:sitting ratio and step count. Pearson correlations were carried out to examine associations between different activity categories and body composition variables. Results There were significant correlations between average daily sitting and liver adiposity and visceral/subcutaneous abdominal fat ratio (r=0.66 and 0.64, respectively); standing:sitting ratio was moderately correlated with liver adiposity and visceral/subcutaneous abdominal fat ratio (r=−0.53 and −0.45); average daily step count was moderately correlated with liver adiposity, total adiposity and visceral/subcutaneous abdominal fat ratio (r=−0.45, −0.46 and −0.51, respectively). Conclusions This pilot study has provided preliminary evidence of relationships between objectively measured sitting and standing and precise measures of body composition.
Description: This is an Open Access article distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial. See: http://creativecommons.org/licenses/by-nc/4.0/
Sponsor: LS is supported by the National Institute for Health Research’s School for Public Health Research. MH is supported by the British Heart Foundation (RE/10/005/28296).
Version: Published
DOI: 10.1136/bmjopen-2014-005476
URI: https://dspace.lboro.ac.uk/2134/19280
Publisher Link: http://dx.doi.org/10.1136/bmjopen-2014-005476
ISSN: 2044-6055
Appears in Collections:Published Articles (Sport, Exercise and Health Sciences)

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