Clinical trial NCT04053686: An Intervention to Reduce Prolonged Sitting in Police Staff
Official title: A-REST (Activity to Reduce Excessive Sitting Time): a Cluster Randomised Controlled Feasibility Trial to Reduce Prolonged Sitting in Police Staff
Study type: INTERVENTIONAL
Overall status: COMPLETED
Phase: NA
Conditions: Sedentary Behavior
Metabolic Syndrome
Affect
Stress, Physiological
Stress, Psychological
Musculoskeletal Pain
Lead sponsor: University of Bedfordshire
Sponsor class: OTHER
First posted: 2019-08-12
Enrollment: 24
Sex: ALL
Minimum age (years): 18
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: yes
Allocation: NA
Intervention model: SINGLE_GROUP
Primary purpose: OTHER

Brief summary: The primary aim of this study is to assess the feasibility of an intervention to reduce and break up prolonged sitting time in full-time police staff. The secondary aims of this study are to assess preliminary effects on patterns of sedentary behaviour (number of breaks, number of prolonged sitting bouts, average duration of prolonged sitting bouts, and total prolonged sitting duration), additional measures of sedentary behaviour (total sitting time, standing, and stepping), cardiometabolic risk markers, physiological stress (cortisol levels), physical health (self-report and postural stability), psychological wellbeing and mood, work stress (self-reported), and work performance (job satisfaction and productivity).

Detailed description: Prolonged sedentary behaviour is associated with a higher incidence of cardiovascular disease and type 2 diabetes. A large proportion of daily sedentary time (sitting) occurs in the workplace. On average, full time office workers spend upwards of 70% of their working day seated with the majority of this time accumulated in sitting bouts ≥ 20 minutes. A recent cross-sectional investigation into the occupational characteristics of over 5,000 British police force employees reported at least 30% identifying as having mainly office-based duties. When trying to reduce prolonged sitting in the workplace, one of the most effective strategies is the use of multi-component interventions. At the present time, sedentary workplace intervention studies in the police are limited.

The primary aim of this study is to assess the feasibility of an intervention to reduce and break up prolonged sitting time at work in full-time police staff. The secondary aims of this study are to assess preliminary effects on sedentary behaviour, cardiometabolic risk markers, physiological stress, physical health, psychological wellbeing and mood, work stress, and work performance.

This has a single-arm, pre-post study design. Participants will receive a multi-component intervention to break up and reduce prolonged sitting including: a presentation/workshop, electronic support, minor environmental modifications, organisational support, and team competition. Assessments will take place at baseline and post-intervention (week 10).

Eligibility criteria: Inclusion Criteria:

* ≥ 0.6 Full Time Equivalent (FTE) work hours
* Ambulatory
* Predominantly desk-based (spend on average ≥ 5-h/day seated at work by self-report)
* Own a smartphone, with ability to keep phone with them during work hours

Exclusion Criteria:

* Planned absence of two weeks or more during the intervention period
* Work part time (\< 0.6 FTE)
* Health contraindications to standing and walking
* Planned relocation to another site, office or workplace
* Have personal access to an active workstation (sit-stand desk, seat cycle, treadmill desk or similar)
* Participating simultaneously in another workplace intervention (for sedentary behaviour, physical activity, diet, lifestyle, or combination thereof)
* Health contraindications to postural stability testing (e.g., injury to the lower extremities in the past six months, dizziness, or epilepsy)

Primary outcomes:
measure: Feasibility - Adherence: Drop-out rates in control and intervention group
timeFrame: From recruitment (typically 4 weeks prior to baseline) up to study completion (typically 12 weeks)
measure: Feasibility - Acceptability: Perceptions of the intervention
timeFrame: At week 11
Secondary outcomes:
measure: Change in the number of breaks (sit-stand transitions) from sedentary time per hour (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in sitting time accrued in prolonged bouts (≥ 30 minutes) (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in the average duration (minutes) of prolonged sitting bouts (≥ 30 minutes) (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in the number of prolonged sitting bouts (≥ 30 minutes) (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in the total duration (minutes) of sitting time (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in step count (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in total stepping time (in minutes) (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Change in total standing time (in minutes) (workplace and daily)
timeFrame: This measure will be assessed at baseline and 10 weeks. At each time point the accelerometer will be worn for 7 days.
measure: Weight (kg)
timeFrame: Baseline and at week 11
measure: Body mass index (BMI)
timeFrame: Baseline and at week 11
measure: Waist circumference (cm)
timeFrame: Baseline and at week 11
measure: Body fat %
timeFrame: Baseline and at week 11
measure: Body fat mass (kg)
timeFrame: Baseline and at week 11
measure: Lean body mass (kg)
timeFrame: Baseline and at week 11
measure: Blood pressure (mmHg)
timeFrame: Baseline and at week 11
measure: Fasted blood cholesterol (mg/dL)
timeFrame: Baseline and at week 11
measure: Fasted blood triglycerides (mg/dL)
timeFrame: Baseline and at week 11
measure: Fasted blood glucose (mg/dL)
timeFrame: Baseline and at week 11
measure: Salivary cortisol (nmol/L)
timeFrame: Baseline and at week 11. At each time point saliva samples will be collected at 7 time points over the course of one day.
measure: Nordic musculoskeletal questionnaire
timeFrame: Baseline and at week 11
measure: Postural sway velocity (mm/s)
timeFrame: Baseline and at week 11
measure: Postural sway range (mm)
timeFrame: Baseline and at week 11
measure: International Physical Activity Questionnaire short form (IPAQ)
timeFrame: Baseline and at week 11
measure: Marshall sitting questionnaire
timeFrame: Baseline and at week 11
measure: Warwick-Edinburgh mental well-being scale (WEMWBS)
timeFrame: Baseline and at week 11
measure: Positive and negative affect schedule (PANAS)
timeFrame: Baseline and at week 11
measure: Operational police stress questionnaire (PSQ-Op)
timeFrame: Baseline and at week 11
measure: Organisational police stress questionnaire (PSQ-Org)
timeFrame: Baseline and at week 11
measure: Job satisfaction
timeFrame: Baseline and at week 11
measure: Job performance
timeFrame: Baseline and at week 11
Other outcomes:
Locations:
city: Bedford
country: United Kingdom
facility: University of Bedfordfordshire
state: Bedfordshire
Study officials:
affiliation: University of Bedfordshire
name: Daniel Bailey, PhD
role: PRINCIPAL_INVESTIGATOR
References: