A Mixed-methods Evaluation of Sit-stand Workstations in an Office Setting

NCT02496507 | Completed

• 1 other identifier: 15-SPS-Graves1
• Study Type: interventional
• Target: 47
• Locations: 1 country
• Sites: 1

Brief Summary

The purpose of this study is to investigate whether a device that allows office workers to sit or stand whilst working can reduce their sitting time at work and improve their health over 8 weeks.

Conditions

Physical Activity

Keywords

sitting; intervention; desks; workplace; cardiovascular; metabolic; qualitative; randomised controlled trial

Outcome Measures

Primary Outcomes (1)

• Change from baseline in workplace sitting time at 4 and 8 weeks

  An ecological momentary assessment (EMA) diary assessed time spent sitting, standing, walking and in other activities during work hours over 5 days (Monday-Friday). At 15-minute intervals participants used a diary to record their main behaviour in response to the question: "What are you doing right now?" The options were sitting, standing, walking or other. If other was selected, participants were instructed to write the activity they were doing. Time spent in each behaviour per day was estimated by multiplying the frequency of recordings by 15. A diary day was considered valid if data entries were provided for ≥75% of time spent at work. Time spent in each behaviour was calculated for each valid day and means were calculated from valid days. To be retained for analyses, participants had to provide ≥2 valid days at each time point.

  Baseline (week 0), Mid-intervention (4 weeks), End-intervention (8 weeks)

Secondary Outcomes (15)

• Change from baseline in workplace standing time at 4 and 8 weeks

  Baseline (week 0), Mid-intervention (4 weeks), End-intervention (8 weeks)

• Change from baseline in workplace walking time at 4 and 8 weeks

  Baseline (week 0), Mid-intervention (4 weeks), End-intervention (8 weeks)

• Change from baseline in flow-mediated dilation (FMD) at 8 weeks

  Baseline (week 0), End-intervention (8 weeks)

• Change from baseline in carotid artery intima media thickness (cIMT) at 8 weeks

  Baseline (week 0), End-intervention (8 weeks)

• Change from baseline in plasma glucose at 8 weeks

  Baseline (week 0), End-intervention (8 weeks)

Study Arms (2)

Intervention

EXPERIMENTAL

Provision of a sit-stand workstation for use at work.

Other: Sit-stand workstation

Control

NO INTERVENTION

Participants were asked to maintain their normal work practices and received no intervention. Participants were offered the opportunity to have a sit-stand workstation installed for 8 weeks after all data collection.

Interventions

Sit-stand workstation OTHER

After baseline, each participant had a sit-stand workstation installed on their existing workplace desk. A single or dual monitor WorkFit-A with Worksurface+ workstation was installed, dependent on the number of monitors. The monitor(s) and keyboard were housed on the workstation and the workstation could be quickly raised up and down by hand to enable seated or standing work. Participants were not prescribed an amount of time to use the station. Ergotron Ltd provided and installed the workstations and gave participants basic face-to-face training and ergonomic information on correct use. Participants received a web link to manufacturer ergonomic guidelines via an email from the research team. After end-intervention data collection, manufacturer staff uninstalled the workstations.

Intervention

Eligibility Criteria

• Age: 18 Years+
• Sex: all
• Healthy Volunteers: Yes
• Age Groups: Adult (18-64), Older Adult (65+)

You may qualify if:

• full-time member of staff
• access to a work telephone and desktop computer with internet

You may not qualify if:

• have a cardiovascular or metabolic disease
• taking any medication
• pregnant
• planned absence \> 1 week during the trial

Sponsors & Collaborators

• Liverpool John Moores University: lead

Study Sites (1)

Liverpool John Moores University

Liverpool, Merseyside, L3 2AT, United Kingdom

Location

Related Publications (3)

• Batterham AM, Hopkins WG. Making meaningful inferences about magnitudes. Int J Sports Physiol Perform. 2006 Mar;1(1):50-7.

  PMID: 19114737 RESULT

• Hopkins WG, Marshall SW, Batterham AM, Hanin J. Progressive statistics for studies in sports medicine and exercise science. Med Sci Sports Exerc. 2009 Jan;41(1):3-13. doi: 10.1249/MSS.0b013e31818cb278.

  PMID: 19092709 RESULT

• E F Graves L, C Murphy R, Shepherd SO, Cabot J, Hopkins ND. Evaluation of sit-stand workstations in an office setting: a randomised controlled trial. BMC Public Health. 2015 Nov 19;15:1145. doi: 10.1186/s12889-015-2469-8.

  PMID: 26584856 DERIVED

MeSH Terms

Conditions

Motor Activity

Condition Hierarchy (Ancestors)

Behavior

Study Officials

• Lee EF Graves, PhD

  Liverpool John Moores University

  PRINCIPAL INVESTIGATOR

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: RANDOMIZED
• Masking: NONE
• Purpose: BASIC SCIENCE
• Intervention Model: PARALLEL
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Lecturer/Senior Lecturer

Study Record Dates

• First Submitted: July 8, 2015
• First Posted: July 14, 2015
• Study Start: August 1, 2013
• Primary Completion: December 1, 2013
• Study Completion: December 1, 2013
• Last Updated: July 14, 2015

Record last verified: 2015-07

Locations

GB (1)